A Joint Model Based on Prior Knowledge for War Research Report Information Extraction

War Research Reports (WRR) objectively describes the composition, deployment and cooperation of troops and weapons in the war, as well as the combat damage. WRR information extraction can provide data for the knowledge graph of damage. The War Research Report Dataset (WRRD) is constructed based on manual tagging and WRR collected on the Internet, then a joint entity and relation extraction model named PRK-CASREL based on prior knowledge for WRR is proposed. The result of the experiment indicates that shows that the proposed model has better recall and F1 than the models involved in comparison.