The ILP model constrained by system predicted content structures (the row +Content Structure) outperforms the pairwise classifier baseline system as well as the two most recent systems consistently across all the evaluation metrics over the two benchmark datasets.
our ILP system outperforms the previous state-of-the-art, the heuristics-based ILP system Choubey and Huang, with average F1 gains of 0.67% and 1.32% on KBP 2016 and KBP 2017 corpora respectively.