Global-to-Local Neural Networks for Document-Level Relation Extraction
This work addresses the problem of extracting semantic relations between entities across entire documents for natural language processing applications, representing an incremental improvement over existing methods.
The paper tackles document-level relation extraction by proposing a model that encodes entity global and local representations along with context relation representations, achieving superior performance on two public datasets, particularly for long-distance relations and entities with multiple mentions.
Relation extraction (RE) aims to identify the semantic relations between named entities in text. Recent years have witnessed it raised to the document level, which requires complex reasoning with entities and mentions throughout an entire document. In this paper, we propose a novel model to document-level RE, by encoding the document information in terms of entity global and local representations as well as context relation representations. Entity global representations model the semantic information of all entities in the document, entity local representations aggregate the contextual information of multiple mentions of specific entities, and context relation representations encode the topic information of other relations. Experimental results demonstrate that our model achieves superior performance on two public datasets for document-level RE. It is particularly effective in extracting relations between entities of long distance and having multiple mentions.