Ling and Weld (2012) 52.30 69.90 69.30 PLE (Ren et al., 2016b) 49.44 68.75 64.54 Ma et al. (2016) 53.54 68.06 66.53 AFET (Ren et al., 2016a) 53.30 69.30 66.40 NEURAL<cite> (Shimaoka et al., 2017)</cite> proach still achieves the state-of-the-art strict and micro F 1 . If compared with the ablation variant of the NEURAL approach, i.e., w/o hand-crafted features, our approach gains significant improvement.