Voting Between Multiple Data Representations for Text Chunking

This paper focuses on choosing specific data representations combined with simple majority voting and achieves high scores for arbitrary phrase identification and Base NP identification on the community standard CoNLL-2000 data set.

Abstract

This paper considers the hypothesis that voting between multiple data representations can be more accurate than voting between multiple learning models. This hypothesis has been considered before (cf. [San00]) but the focus was on voting methods rather than the data representations. In this paper, we focus on choosing specific data representations combined with simple majority voting. On the community standard CoNLL-2000 data set, using no additional knowledge sources apart from the training data, we achieved 94.01 F β= 1 score for arbitrary phrase identification compared to the previous best F β= 1 93.90. We also obtained 95.23 F β= 1 score for Base NP identification. Significance tests show that our Base NP identification score is significantly better than the previous comparable best F β= 1 score of 94.22. Our main contribution is that our model is a fast linear time approach and the previous best approach is significantly slower than our system.