Prototype-based Active Learning for Lemmatization Walter Daelemans author Hendrik J Groenewald author Gerhard B van Huyssteen author 2009-09 text Proceedings of the International Conference RANLP-2009 Galia Angelova editor Ruslan Mitkov editor Association for Computational Linguistics Borovets, Bulgaria conference publication daelemans-etal-2009-prototype https://aclanthology.org/R09-1013/ 2009-09 65 70