Automatic phrase indexing for document retrieval
SIGIR '87 Proceedings of the 10th annual international ACM SIGIR conference on Research and development in information retrieval
Viewing morphology as an inference process
SIGIR '93 Proceedings of the 16th annual international ACM SIGIR conference on Research and development in information retrieval
Exploiting syntactic analysis of queries for information retrieval
Data & Knowledge Engineering
Comparing the Effect of Syntactic vs. Statistical Phrase Indexing Strategies for Dutch
ECDL '98 Proceedings of the Second European Conference on Research and Advanced Technology for Digital Libraries
On the Usefulness of Extracting Syntactic Dependencies for Text Indexing
AICS '02 Proceedings of the 13th Irish International Conference on Artificial Intelligence and Cognitive Science
High-performance, open-domain question answering from large text collections
High-performance, open-domain question answering from large text collections
Monolingual Document Retrieval for European Languages
Information Retrieval
Fast statistical parsing of noun phrases for document indexing
ANLC '97 Proceedings of the fifth conference on Applied natural language processing
Information extraction for question answering: improving recall through syntactic patterns
COLING '04 Proceedings of the 20th international conference on Computational Linguistics
CLEF'04 Proceedings of the 5th conference on Cross-Language Evaluation Forum: multilingual Information Access for Text, Speech and Images
Genetic algorithms for data-driven web question answering
Evolutionary Computation
Using syntactic information for improving why-question answering
COLING '08 Proceedings of the 22nd International Conference on Computational Linguistics - Volume 1
Answer typing for information retrieval
Proceedings of the 18th ACM conference on Information and knowledge management
What is not in the bag of words for why-qa?
Computational Linguistics
Passage filtering for open-domain question answering
FinTAL'06 Proceedings of the 5th international conference on Advances in Natural Language Processing
Using syntactic knowledge for QA
CLEF'06 Proceedings of the 7th international conference on Cross-Language Evaluation Forum: evaluation of multilingual and multi-modal information retrieval
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This paper describes an approach for the integration of linguistic information in passage retrieval in an open-source question answering system for Dutch. Annotation produced by the wide-coverage dependency parser Alpino is stored in multiple index layers to be matched with natural language question that have been analyzed by the same parser. We present a genetic algorithm to select features to be included in retrieval queries and for optimizing keyword weights. The system is trained on questions annotated with their answers from the competition on Dutch question answering within the Cross-Language Evaluation Forum (CLEF). The optimization yielded a significant improvement of about 19% in mean reciprocal rank scores on unseen evaluation data compared to the base-line using traditional information retrieval with plain text keywords.