Publication: Part-Of-Speech in Historical Corpora: Tagger Evaluation and Ensemble Systems on ARCHER
Part-Of-Speech in Historical Corpora: Tagger Evaluation and Ensemble Systems on ARCHER
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Schneider, G., Hundt, M., & Oppliger, R. (2016, September 21). Part-Of-Speech in Historical Corpora: Tagger Evaluation and Ensemble Systems on ARCHER. KONVENS 2016, Bochum.
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Tagger accuracy deteriorates when applied to texts different from the training corpus, e.g. with respect to register or time period. On historical data, accuracy can drop to and below 90%. We are tagging and parsing ARCHER, a historical corpus sampled from British and American texts from 1600-1999. We improve tagging accuracy by (1) using a version of the corpus that has been automatically mapped to PDE spelling with VARD, (2) by combining several part-of-speech taggers in an ensemble system – which improves tagging by about 1% over C
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Schneider, G., Hundt, M., & Oppliger, R. (2016, September 21). Part-Of-Speech in Historical Corpora: Tagger Evaluation and Ensemble Systems on ARCHER. KONVENS 2016, Bochum.
