Integrating Seed Names and ngrams for a Named Entity List and Classifier
Sabine Buchholz, Antal van den Bosch · 2000
We present a method for building a named-entity list and machine-learned named-entity classifier from a corpus of Dutch newspaper text, a rule-based named entity recognizer, and labeled seed name lists taken from the internet.The seed names, labeled either as PERSON, LOCATION, ORGANIZATION, or ADJECTIVAL name, are looked up in a 83-million word corpus, and their immediate contexts are stored as instances of their label.The latter 8-grams are used by a memory-based machine learning algorithm that, after training, (i) can produce high-precision labeling of instances to be added to the seed lists, and (ii) more generally labels new, unseen names.Unlabeled named-entity types are labeled with a precision of 61 % and a recall of 56 %.On free text, named-entity token labeling accuracy is 71 %.