Table 3 Lexical-syntactic patterns used to identify non-specified relations in texts
From: Open information extraction based on lexical semantics
Example | Pattern | Triple |
|---|---|---|
A central branch of metaphysics is ontology; | ‘A’ NP ‘OF’ NP ‘IS’ NP | (ontology, is a central branch, metaphysics) |
Biology is the study of living things | NP ‘IS’ ‘THE’ EXP ‘OF’ NP | (Biology, study, living things) |
Aristotle born in Stageira | NP VB (‘IN’ | ‘AT’) NP | (Aristotle, born, Stageira) |
Aristotle was born in Stageira | NP (‘WAS’ | ‘IS’) VP (‘IN’ | ‘AT’) NP | (Aristotle, born, Stageira) |