Extraction of semantic biomedical relations from text using conditional random fields

BMC Bioinformatics

Table 4 Evaluation of System Components.

Baseline CRF	•	•	•	•	•	•
Dictionaries		•	•	•	•	•
Dictionary Window			•	•	•	•
Start Window				•	•	•
Key Entity Neighborhood					•	•
Negation Window						•
Recall	35.89	38.13	64.30	70.01	71.81	72.16
Precision	41.47	41.30	70.78	74.00	75.87	78.56
F-score	38.48	39.65	67.38	71.94	73.98	75.22

Contribution of different features to the overall performance of the one-step CRF for the 9th cross-validation run. The baseline model includes orthographic, word shape, n-gram and the basic context feature.

ISSN: 1471-2105