The experimental re-sults show that both of our models perform better than the state-of-the-art baseline (Gao et al., 2018) across three benchmark datasets.
our MIP based model with a simple DNN architecture, outperforms the baseline with an average of 2.2% improvement in F1 score, whereas the SPV based model with a novel multi-head contextual attention mechanism achieves an even higher gain of 2.5% against the baseline.