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:  During the iterative process, the two modules keep interacting to alleviate the noisy and long-tail problem simultaneously . Extensive experiments conducted on the widely used NYT dataset show significant improvement over state-of-the-art baseline methods .