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EMNLP
2009
14 years 8 months ago
Human-competitive tagging using automatic keyphrase extraction
This paper connects two research areas: automatic tagging on the web and statistical keyphrase extraction. First, we analyze the quality of tags in a collaboratively created folks...
Olena Medelyan, Eibe Frank, Ian H. Witten
EMNLP
2009
14 years 8 months ago
Polynomial to Linear: Efficient Classification with Conjunctive Features
This paper proposes a method that speeds up a classifier trained with many conjunctive features: combinations of (primitive) features. The key idea is to precompute as partial res...
Naoki Yoshinaga, Masaru Kitsuregawa
EMNLP
2009
14 years 8 months ago
Investigation of Question Classifier in Question Answering
In this paper, we investigate how an accurate question classifier contributes to a question answering system. We first present a Maximum Entropy (ME) based question classifier whi...
Zhiheng Huang, Marcus Thint, Asli Çelikyilm...
EMNLP
2009
14 years 8 months ago
A Unified Model of Phrasal and Sentential Evidence for Information Extraction
Information Extraction (IE) systems that extract role fillers for events typically look at the local context surrounding a phrase when deciding whether to extract it. Often, howev...
Siddharth Patwardhan, Ellen Riloff
EMNLP
2009
14 years 8 months ago
Clustering to Find Exemplar Terms for Keyphrase Extraction
Keyphrases are widely used as a brief summary of documents. Since manual assignment is time-consuming, various unsupervised ranking methods based on importance scores are proposed...
Zhiyuan Liu, Peng Li, Yabin Zheng, Maosong Sun