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arXiv · 1805.05377

Large-Scale QA-SRL Parsing

Nicholas FitzGerald·Julian Michael·Luheng He·Luke Zettlemoyer
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Abstract

We present a new large-scale corpus of Question-Answer driven Semantic Role Labeling (QA-SRL) annotations, and the first high-quality QA-SRL parser. Our corpus, QA-SRL Bank 2.0, consists of over 250,000 question-answer pairs for over 64,000 sentences across 3 domains and was gathered with a new crowd-sourcing scheme that we show has high precision and good recall at modest cost. We also present neural models for two QA-SRL subtasks: detecting argument spans for a predicate and generating questions to label the semantic relationship. The best models achieve question accuracy of 82.6% and span-level accuracy of 77.6% (under human evaluation) on the full pipelined QA-SRL prediction task. They can also, as we show, be used to gather additional annotations at low cost.

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Nicholas FitzGerald, Julian Michael, Luheng He, Luke Zettlemoyer. 2018-05-14. Large-Scale QA-SRL Parsing. https://arxiv.org/abs/1805.05377

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