Before revision:  Moreover, we define a hierarchical weighted ranking loss function to implement top-down search processing . Extensive experiments conducted on the widely used NYT dataset show significant improvement over state-of-the-art baseline methods .
After revision:  Moreover, we define a hierarchical weighted ranking loss function to implement top-down search processing . Extensive experiments conducted on the widely used NYT data set clearly show that our method significant improvements over state-of-the-art baseline methods .