We show several topperforming systems in the table as well, where M&B (2016) refers to Miwa and Bansal (2016), who exploit end-to-end LSTM neural networks with local optimization, and L&J (2014) and M&S (2014) refer to Li and Ji (2014) and Miwa and Sasaki (2014), respectively, which are both globally optimized models using discrete features, giving the top F-scores among statistical models.
we verify this by examining the sentence-level accuracies, where one sentence is regarded as correct when all the labels in the resulted table are correct.