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Grounded Adaptation for Zero-shot Executable Semantic Parsing

2020-09-16 00:16:59
Victor Zhong, Mike Lewis, Sida I. Wang, Luke Zettlemoyer

Abstract

We propose Grounded Adaptation for Zero-shot Executable Semantic Parsing (GAZP) to adapt an existing semantic parser to new environments (e.g. new database schemas). GAZP combines a forward semantic parser with a backward utterance generator to synthesize data (e.g. utterances and SQL queries) in the new environment, then selects cycle-consistent examples to adapt the parser. Unlike data-augmentation, which typically synthesizes unverified examples in the training environment, GAZP synthesizes examples in the new environment whose input-output consistency are verified. On the Spider, Sparc, and CoSQL zero-shot semantic parsing tasks, GAZP improves logical form and execution accuracy of the baseline parser. Our analyses show that GAZP outperforms data-augmentation in the training environment, performance increases with the amount of GAZP-synthesized data, and cycle-consistency is central to successful adaptation.

Abstract (translated)

URL

https://arxiv.org/abs/2009.07396

PDF

https://arxiv.org/pdf/2009.07396.pdf


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