?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Nguyen%2C+Ngoc+Vu&rft.aulast=Nguyen&rft.aufirst=Ngoc+Vu&rft.date=16+December+2020&rft.title=A+Word+%2B+Character+Embedding+based+Relation+Extraction+Frame+for+Domain+Ontology+of+Natural+Resources+and+Environment&rft.genre=proceeding