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Table 5 features for traditional statistical baselines

From: BioRel: towards large-scale biomedical relation extraction

Lexical

The sequence of words between the two entities

The part-of-speech of words between the two entities

A flag indicating which entity came first in the sentence

A window of k words to the left of the first entity and their part-of-speech tags

A window of k words to the right of the second entity and their part-of-speech tags

Syntactic

A dependency path between the two entities

Part-of-speech of words in dependency path

A ‘window’ node that is not part of the dependency path