I filed a jira (https://issues.apache.org/jira/browse/CTAKES-184) for an issue in the srl component of the dependency parser. Here is the issue: The SRL component grabs the Dependency Node for each token using the token span. When there is a one-word sentence there are two such nodes, the "head" node which spans the sentence and the token node. There is a quick fix checked in that looks at the "id" field, but it would be preferable to fix it upstream so that users of the Dependency types don't need to know about this issue.

Here are a few possibilities, any other ideas?
1) Change the span of the head node, maybe to 0 length at the start of the sentence?
2) Create a separate type for DependencyTreeHead, perhaps spanless



--
Tim Miller, PhD
Postdoctoral Research Fellow
Children's Hospital Informatics Program
Boston Children's Hospital and Harvard Medical School
617-919-1223

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