Annotation of chemical named entities

  • Corbett P
  • Batchelor C
  • Teufel S
  • 44

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Abstract

We describe the annotation of chemical
named entities in scientific text. A set of an-
notation guidelines defines 5 types of named
entities, and provides instructions for the
resolution of special cases. A corpus of full-
text chemistry papers was annotated, with an
inter-annotator agreement F score of 93%. An investigation of named entity recognition using LingPipe suggests that F
scores of 63% are possible without customisation,
and scores of 74% are possible with the addition of custom tokenisation and the use of dictionaries.

Author-supplied keywords

  • Chemical NER
  • Corpus Assembly
  • NLP

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Authors

  • P Corbett

  • C Batchelor

  • S Teufel

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