RESEARCH
NLP
Using Local Knowledge Graph Construction to Scale Seq2Seq Models to Multi-Document Inputs
October 17, 2019
Abstract
Query-based open-domain NLP tasks require information synthesis from long and diverse web results. Current approaches extractively select portions of web text as input to Sequence-to-Sequence models using methods such as TF-IDF ranking. We propose constructing a local graph structured knowledge base for each query, which compresses the web search information and reduces redundancy. We show that by linearizing the graph into a structured input sequence, models can encode the graph representations within a standard Sequence-to-Sequence setting. For two generative tasks with very long text input, long-form question answering and multidocument summarization, feeding graph representations as input can achieve better performance than using retrieved text portions.
AUTHORS
Publisher
EMNLP
Research Topics
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