title: Developing a hybrid dictionary-based bio-entity recognition technique.
abstract: BACKGROUND
  Bio-entity extraction is a pivotal component for information extraction from biomedical literature. The dictionary-based bio-entity extraction is the first generation of Named Entity Recognition (NER) techniques.
  
  
  METHODS
  This paper presents a hybrid dictionary-based bio-entity extraction technique. The approach expands the bio-entity dictionary by combining different data sources and improves the recall rate through the shortest path edit distance algorithm. In addition, the proposed technique adopts text mining techniques in the merging stage of similar entities such as Part of Speech (POS) expansion, stemming, and the exploitation of the contextual cues to further improve the performance.
  
  
  RESULTS
  The experimental results show that the proposed technique achieves the best or at least equivalent performance among compared techniques, GENIA, MESH, UMLS, and combinations of these three resources in F-measure.
  
  
  CONCLUSIONS
  The results imply that the performance of dictionary-based extraction techniques is largely influenced by information resources used to build the dictionary. In addition, the edit distance algorithm shows steady performance with three different dictionaries in precision whereas the context-only technique achieves a high-end performance with three difference dictionaries in recall.
authors.forename: Min
authors.initials: M
authors.lastname: Song
authors.forename: Hwanjo
authors.initials: H
authors.lastname: Yu
authors.forename: Wook-Shin
authors.initials: WS
authors.lastname: Han
mesh_terms: D057225:Data Mining / Q000379:methods*; D008490:Medical Informatics / Q000379:methods*; D018875:Vocabulary, Controlled