Large-Scale Goodness Polarity Lexicons for Community Question Answering
Large-Scale Goodness Polarity Lexicons for Community Question Answering
复制标题
用于社区问答的大规模善良极性词典
DOI:
10.1145/3077136.3080757
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发表时间:
2017
期刊:
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通讯作者:
Preslav Nakov
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文献类型:
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作者:
Todor Mihaylov;Daniel Balchev;Yasen Kiprov;Ivan Koychev;Preslav Nakov
We transfer a key idea from the field of sentiment analysis to a new domain: community question answering (cQA). The cQA task we are interested in is the following: given a question and a thread of comments, we want to re-rank the comments, so that the ones that are good answers to the question would be ranked higher than the bad ones. We notice that good vs. bad comments use specific vocabulary and that one can often predict the goodness/badness of a comment even ignoring the question, based on the comment contents only. This leads us to the idea to build a good/bad polarity lexicon as an analogy to the positive/negative sentiment polarity lexicons, commonly used in sentiment analysis. In particular, we use pointwise mutual information in order to build large-scale goodness polarity lexicons in a semi-supervised manner starting with a small number of initial seeds. The evaluation results show an improvement of 0.7 MAP points absolute over a very strong baseline, and state-of-the art performance on SemEval-2016 Task 3.
DOI:
10.18653/v1/w16-0427
发表时间:
2016
期刊:
ArXiv
影响因子:
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作者:
Preslav Nakov
通讯作者:
Preslav Nakov
DOI:
10.18653/v1/s16-1136
发表时间:
2016-06
期刊:
ArXiv
影响因子:
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作者:
Todor Mihaylov;Preslav Nakov
通讯作者:
Todor Mihaylov;Preslav Nakov
DOI:
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