Decoupling Structure and Lexicon for Zero-Shot Semantic Parsing (D18-1)

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Challenge: Existing methods for training semantic parsers in new domains require expensive supervision and lack the ability to generalize to new domain.
Approach: They propose a zero-shot approach to parsing utterances in unseen domains . they map an utterant to an abstract, domain independent, logical form and replace slots with KB constants based on lexical alignment scores and global inference .
Outcome: The proposed model achieves 53.4% accuracy on 7 domains in the OVERNIGHT dataset, significantly better than other zero-shot baselines and performs as good as a parser trained on over 30% of the target domain examples.

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Challenge: Recent years have seen an increasing number of applications that have a natural language interface, such as chatbots or "intelligent personal assistants"
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Challenge: Existing training data is limited for languages other than English, so is the performance of the developed parsers.
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Challenge: Large pretrained language models excel at generating natural language, but they are not efficient for task specific semantic parsing.
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Challenge: a recent study shows that state-of-the-art neural semantic parsers are less accurate when there is only a handful of utterance-logical form pairs per predicate.
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