Table 5 Feature combinations used for post-challenge runs on the CEM subtask.
From: A CRF-based system for recognizing chemical entity mentions (CEMs) in biomedical literature
| Â | Â | Â | Â | Â | Word Representation | |||
|---|---|---|---|---|---|---|---|---|
| Â | General Linguistic | Character | Case Pattern | Contextual | 500 | 1000 | 1500 | 2000 |
Run1 | √ | √ | √ | √ |  |  |  |  |
Run2 | √ | √ | √ | √ | √ |  |  |  |
Run3 | √ | √ | √ | √ |  | √ |  |  |
Run4 | √ | √ | √ | √ |  |  | √ |  |
Run5 | √ | √ | √ | √ |  |  |  | √ |