Table 2 List of syntactic and surface features
From: Identifying genotype-phenotype relationships in biomedical text
Features | Description |
Syntactic features | |
Stemmed version of relationship term in the Least Common Ancestor (LCA) node of the two entities | If the head6 of the LCA node of the two entities in the syntax tree is a relationship term then this feature takes a stemmed version of the head word as its value, otherwise it takes a NULL value. |
The label of each of the constituents in the path between the LCA and each entity combined with its distance from the LCA node | Â |
Surface features | |
Relationship terms and their relative positions | The relationship terms between two entities or within a short distance (4 tokens) from them. |