We present a novel attention-based recurrent neural network for joint extraction of entity mentions and relations. We show that attention along with long short term memory (LSTM) network can extract semantic relations between entity mentions without having access to dependency trees. Experiments on Automatic Content Extraction (ACE) corpora show that our model significantly outperforms featurebased joint model by Li and Ji (2014) . We also compare our model with an end-toend tree-based LSTM model (SPTree) by Miwa and Bansal (2016) and show that our model performs within 1% on entity mentions and 2% on relations. Our finegrained analysis also shows that our model performs significantly better on AGENT-ARTIFACT relations, while SPTree performs better on PHYSICAL and PART-WHOLE relations.
REF propose an attention-based joint neural model without accessing to dependency trees.
Going out on a limb: Joint Extraction of Entity Mentions and Relations without Dependency Trees
ACL
Computer Science