End to end 2 Entity relation extractions Extraction 2 'current 1 Adverse drug event 1 Aggregation model 1 Background extraction 1 Biomedical literature 1 Distance feature 1 Domain Knowledge 1 Drug safety 1 Drug-Related Side Effects and Adverse Reactions 1 Entity-relation extraction 1 Event identification 1 Extraction modeling 1 Feature aggregation 1 Graph neural networks 1 Health care 1 Healthcare 1 Humans 1 Learn+ 1 Long short-term memory 1 Natural language processing systems 1 Neural Networks, Computer 1 Pipelines 1 Question Answering 1 Question-answering 1 RoBERTa 1 Semantics 1 Textual data 1