CYC: a large-scale investment in knowledge infrastructure
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Maintaining knowledge about temporal intervals
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Towards a standard upper ontology
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Generalized Search Trees for Database Systems
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Handbook of Temporal Reasoning in Artificial Intelligence (Foundations of Artificial Intelligence (Elsevier))
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Literature review of spatio-temporal database models
The Knowledge Engineering Review
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IEEE Transactions on Knowledge and Data Engineering
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ACLdemo '05 Proceedings of the ACL 2005 on Interactive poster and demonstration sessions
Yago: a core of semantic knowledge
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On the value of temporal information in information retrieval
ACM SIGIR Forum
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YAGO: A Large Ontology from Wikipedia and WordNet
Web Semantics: Science, Services and Agents on the World Wide Web
WebTables: exploring the power of tables on the web
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Learning to link with wikipedia
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GikiP: evaluating geographical answers from wikipedia
Proceedings of the 2nd international workshop on Geographic information retrieval
Information extraction challenges in managing unstructured data
ACM SIGMOD Record
StatSnowball: a statistical approach to extracting entity relationships
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SOFIE: a self-organizing framework for information extraction
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Collective annotation of Wikipedia entities in web text
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A Reusable Ontology for Fluents in OWL
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Deriving a large scale taxonomy from Wikipedia
AAAI'07 Proceedings of the 22nd national conference on Artificial intelligence - Volume 2
Open information extraction from the web
IJCAI'07 Proceedings of the 20th international joint conference on Artifical intelligence
DBpedia - A crystallization point for the Web of Data
Web Semantics: Science, Services and Agents on the World Wide Web
Unsupervised named-entity extraction from the Web: An experimental study
Artificial Intelligence
Towards a universal wordnet by learning from combined evidence
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Handbook on Ontologies
ACM Transactions on Computational Logic (TOCL)
Large-scale taxonomy mapping for restructuring and integrating wikipedia
IJCAI'09 Proceedings of the 21st international jont conference on Artifical intelligence
The RDF-3X engine for scalable management of RDF data
The VLDB Journal — The International Journal on Very Large Data Bases
Timely YAGO: harvesting, querying, and visualizing temporal knowledge from Wikipedia
Proceedings of the 13th International Conference on Extending Database Technology
Supporting complex thematic, spatial and temporal queries over semantic web data
GeoS'07 Proceedings of the 2nd international conference on GeoSpatial semantics
DBpedia: a nucleus for a web of open data
ISWC'07/ASWC'07 Proceedings of the 6th international The semantic web and 2nd Asian conference on Asian semantic web conference
Distinguishing between instances and classes in the wikipedia taxonomy
ESWC'08 Proceedings of the 5th European semantic web conference on The semantic web: research and applications
From information to knowledge: harvesting entities and relationships from web sources
Proceedings of the twenty-ninth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
GikiP at GeoCLEF 2008: joining GIR and QA forces for querying Wikipedia
CLEF'08 Proceedings of the 9th Cross-language evaluation forum conference on Evaluating systems for multilingual and multimodal information access
The Artificial Intelligence
BabelNet: building a very large multilingual semantic network
ACL '10 Proceedings of the 48th Annual Meeting of the Association for Computational Linguistics
Knowledge-rich Word Sense Disambiguation rivaling supervised systems
ACL '10 Proceedings of the 48th Annual Meeting of the Association for Computational Linguistics
HeidelTime: High quality rule-based extraction and normalization of temporal expressions
SemEval '10 Proceedings of the 5th International Workshop on Semantic Evaluation
MENTA: inducing multilingual taxonomies from wikipedia
CIKM '10 Proceedings of the 19th ACM international conference on Information and knowledge management
Annotating and searching web tables using entities, types and relationships
Proceedings of the VLDB Endowment
Scalable knowledge harvesting with high precision and high recall
Proceedings of the fourth ACM international conference on Web search and data mining
YAGO2: exploring and querying world knowledge in time, space, context, and many languages
Proceedings of the 20th international conference companion on World wide web
Taxonomy induction based on a collaboratively built knowledge repository
Artificial Intelligence
Recovering semantics of tables on the web
Proceedings of the VLDB Endowment
Harvesting facts from textual web sources by constrained label propagation
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Coupled temporal scoping of relational facts
Proceedings of the fifth ACM international conference on Web search and data mining
A language modeling approach for temporal information needs
ECIR'2010 Proceedings of the 32nd European conference on Advances in Information Retrieval
Robust disambiguation of named entities in text
EMNLP '11 Proceedings of the Conference on Empirical Methods in Natural Language Processing
GeoWordNet: a resource for geo-spatial applications
ESWC'10 Proceedings of the 7th international conference on The Semantic Web: research and Applications - Volume Part I
ESWC'10 Proceedings of the 7th international conference on The Semantic Web: research and Applications - Volume Part I
A graph-based algorithm for inducing lexical taxonomies from scratch
IJCAI'11 Proceedings of the Twenty-Second international joint conference on Artificial Intelligence - Volume Volume Three
Probabilistic databases of universal schema
AKBC-WEKEX '12 Proceedings of the Joint Workshop on Automatic Knowledge Base Construction and Web-scale Knowledge Extraction
KORE: keyphrase overlap relatedness for entity disambiguation
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WiSeNet: building a wikipedia-based semantic network with ontologized relations
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Collaboratively built semi-structured content and Artificial Intelligence: The story so far
Artificial Intelligence
RDFS reasoning on massively parallel hardware
ISWC'12 Proceedings of the 11th international conference on The Semantic Web - Volume Part I
Lo mejor de dos idiomas: cross-lingual linkage of geotagged wikipedia articles
ECIR'13 Proceedings of the 35th European conference on Advances in Information Retrieval
Knowledge harvesting in the big-data era
Proceedings of the 2013 ACM SIGMOD International Conference on Management of Data
CICLing'13 Proceedings of the 14th international conference on Computational Linguistics and Intelligent Text Processing - Volume Part I
Harnessing linked knowledge sources for topic classification in social media
Proceedings of the 24th ACM Conference on Hypertext and Social Media
Discovering and disambiguating named entities in text
Proceedings of the 2013 Sigmod/PODS Ph.D. symposium on PhD symposium
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Communications of the ACM
Topic hierarchy construction for the organization of multi-source user generated contents
Proceedings of the 36th international ACM SIGIR conference on Research and development in information retrieval
Sparqling kleene: fast property paths in RDF-3X
First International Workshop on Graph Data Management Experiences and Systems
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Proceedings of the 22nd international conference on World Wide Web companion
AMIE: association rule mining under incomplete evidence in ontological knowledge bases
Proceedings of the 22nd international conference on World Wide Web
Multi-step classification approaches to cumulative citation recommendation
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Robust question answering over the web of linked data
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QBEES: query by entity examples
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Universal schema for entity type prediction
Proceedings of the 2013 workshop on Automated knowledge base construction
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Statistical relational data integration for information extraction
RW'13 Proceedings of the 9th international conference on Reasoning Web: semantic technologies for intelligent data access
Construction of a Japanese gazetteers for Japanese local toponym disambiguation
Proceedings of the 7th Workshop on Geographic Information Retrieval
IBminer: a text mining tool for constructing and populating InfoBox databases and knowledge bases
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Integrating syntactic and semantic analysis into the open information extraction paradigm
IJCAI'13 Proceedings of the Twenty-Third international joint conference on Artificial Intelligence
YAGO2: a spatially and temporally enhanced knowledge base from wikipedia (extended abstract)
IJCAI'13 Proceedings of the Twenty-Third international joint conference on Artificial Intelligence
Trust, but verify: predicting contribution quality for knowledge base construction and curation
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STEP: An ontology-based smart clinical document template editing and production system
Expert Systems with Applications: An International Journal
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Proceedings of the 23rd international conference on World wide web
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Proceedings of the 23rd international conference on World wide web
TripleProv: efficient processing of lineage queries in a native RDF store
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Discovering and Characterizing Places of Interest Using Flickr and Twitter
International Journal on Semantic Web & Information Systems
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We present YAGO2, an extension of the YAGO knowledge base, in which entities, facts, and events are anchored in both time and space. YAGO2 is built automatically from Wikipedia, GeoNames, and WordNet. It contains 447 million facts about 9.8 million entities. Human evaluation confirmed an accuracy of 95% of the facts in YAGO2. In this paper, we present the extraction methodology, the integration of the spatio-temporal dimension, and our knowledge representation SPOTL, an extension of the original SPO-triple model to time and space.