Aspect Specific Opinion Expression Extraction using Attention based LSTM-CRF Network
Table 1: Comparison of results with baselines
['Model', 'Precision', 'Recall', 'F-score']
Our model significantly outperforms CRF and LSTM-CNN-CRF on F-score. It also improves over semi-CRF at p<0.05. semi-CRF performs close to our model due to the fact that many opinion phrases are noun phrases (NPs) and verb phrases (VPs), and its use of segment level labeling greatly improved recall but it suffers in precision.