Question Answering (State of the art)

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Answer Sentence Selection

The task of answer sentence selection is designed for the open-domain question answering setting. Given a question and a set of candidate sentences, the task is to choose the correct sentence that contains the exact answer and can sufficiently support the answer choice.

  • QA Answer Sentence Selection Dataset: labeled sentences using TREC QA track data, provided by Mengqiu Wang and first used in Wang et al. (2007). Over time, this dataset diverged to two versions: both have the same training set but their development and test sets differ due to different pre-processing. The raw version has 82 questions in the development set and 100 questions in the test set. Recently, the raw dataset was cleaned by some researchers (Tan et al. 2015, dos Santos et al. 2016, Wang et al. 2016) by removing those questions with no answers or with only positive/negative answers, leaving 65 questions in the development set and 68 questions in the test set.


Algorithm -- Raw Version Reference MAP MRR
Punyakanok (2004) Wang et al. (2007) 0.419 0.494
Cui (2005) Wang et al. (2007) 0.427 0.526
Wang (2007) Wang et al. (2007) 0.603 0.685
H&S (2010) Heilman and Smith (2010) 0.609 0.692
W&M (2010) Wang and Manning (2010) 0.595 0.695
Yao (2013) Yao et al. (2013) 0.631 0.748
S&M (2013) Severyn and Moschitti (2013) 0.678 0.736
Shnarch (2013) - Backward Shnarch (2013) 0.686 0.754
Yih (2013) - LCLR Yih et al. (2013) 0.709 0.770
Yu (2014) - TRAIN-ALL bigram+count Yu et al. (2014) 0.711 0.785
W&N (2015) - Three-Layer BLSTM+BM25 Wang and Nyberg (2015) 0.713 0.791
Feng (2015) - Architecture-II Tan et al. (2015) 0.711 0.800
S&M (2015) Severyn and Moschitti (2015) 0.746 0.808
W&I (2015) Wang and Ittycheriah (2015) 0.746 0.820
H&L (2015) He and Lin (2016) 0.755 0.825
Rao (2016) - Pairwise + Multiple Perspective CNN Rao et al. (2016) 0.780 0.834


Algorithm -- Clean Version Reference MAP MRR
Tan (2015) - QA-LSTM/CNN+attention Tan et al. (2015) 0.728 0.832
dos Santos (2016) - Attentive Pooling CNN dos Santos et al. (2016) 0.753 0.851
Wang et al. (2016) - Lexical Decomposition and Composition Wang et al. (2016) 0.771 0.845
Rao et al. (2016) - Pairwise + Multiple Perspective CNN Rao et al. (2016) 0.801 0.877

References