Reading Wikipedia to Answer Open-Domain Questions

This paper proposes to tackle open- domain question answering using Wikipedia as the unique knowledge source: the answer to any factoid question is a text span in a Wikipedia article. This task of machine reading at scale combines the challenges of document retrieval (finding the relevant articles) with that of machine comprehension of text (identifying the answer spans from those articles). Our approach combines a search component based on bigram hashing and TF-IDF matching with a multi-layer recurrent neural network model trained to detect answers in Wikipedia paragraphs. Our experiments on multiple existing QA datasets indicate that (1) both modules are highly competitive with respect to existing counterparts and (2) multitask learning using distant supervision on their combination is an effective complete system on this challenging task.

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Task Dataset Model Metric Name Metric Value Global Rank Result Benchmark
Question Answering Natural Questions (long) DrQA F1 46.1 # 8
Open-Domain Question Answering SQuAD1.1 DrQA EM 70.0 # 1
Question Answering SQuAD1.1 Document Reader (single model) EM 70.733 # 158
F1 79.353 # 164
Question Answering SQuAD1.1 dev DrQA (Document Reader only) EM 69.5 # 38
F1 78.8 # 40

Results from Other Papers

Task Dataset Model Metric Name Metric Value Rank Source Paper Compare
Question Answering Quasart-T DrQA EM 37.7 # 7
Open-Domain Question Answering SearchQA DrQA EM 41.9 # 9


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