Table 1 Rules for syntactic feature generation
Rule name | Description |
|---|---|
Verb in dependency path | In the level of root (verb), shows subordinate dependency relation types and directions |
No verb in dependency path | Determine whether the sentence has a verb or not between two entities. If not, detect nominalization or weak nominalization rule is processed |
Contains clause | Check if the sentence has any clauses |
Clause distance | Distance between clause and entities in left and right, the closest ones. The entities might be all to the right or to the left or divided |
Same head | Check if two entities have same parent |
Full tree path | Use it in dependency parsing process |
Path length | Path length from the parent node to child node |