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. Author manuscript; available in PMC: 2018 Apr 10.
Published in final edited form as: Stud Health Technol Inform. 2017;245:950–954.

Table 3.

Definition of TP, FP, FN, TN of a NER System

True positive System extracts a concept that matches the label
False positive System extracts a concept but there is no label or doesn’t match the correct label
False negative System doesn’t extract a concept but there is a label
True negative System doesn’t extract a concept and there is no label