LDA in character-LSTM-CRF named entity recognition

Abstract

In this paper, we present a NER system based upon deep learning models with character sequence encoding and word sequence encoding in LSTM layers. The results are boosted with LDA topic models and linear-chain CRF sequence tagging. We reach the new state-of-the-art performance in NER of 81.77 F-measure for Czech and 85.91 F-measure Spanish.