JSEEGraph: Joint Structured Event Extraction as Graph Parsing
Huiling You, Samia Touileb, Lilja {\O}vrelid

TL;DR
JSEEGraph is a graph-based framework for event extraction that models entities, events, and relations in a unified graph, enabling nested, overlapping structures and joint inference across multiple IE tasks.
Contribution
It introduces a novel graph parsing approach to event extraction, allowing for nested structures and joint task inference, improving over flat sequence labeling methods.
Findings
Handles nested and overlapping event structures effectively.
Joint inference improves accuracy across IE tasks.
Beneficial for multi-language and complex datasets.
Abstract
We propose a graph-based event extraction framework JSEEGraph that approaches the task of event extraction as general graph parsing in the tradition of Meaning Representation Parsing. It explicitly encodes entities and events in a single semantic graph, and further has the flexibility to encode a wider range of additional IE relations and jointly infer individual tasks. JSEEGraph performs in an end-to-end manner via general graph parsing: (1) instead of flat sequence labelling, nested structures between entities/triggers are efficiently encoded as separate nodes in the graph, allowing for nested and overlapping entities and triggers; (2) both entities, relations, and events can be encoded in the same graph, where entities and event triggers are represented as nodes and entity relations and event arguments are constructed via edges; (3) joint inference avoids error propagation and…
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Taxonomy
TopicsTopic Modeling · Natural Language Processing Techniques · Biomedical Text Mining and Ontologies
