Question: for perfectly elastic body the value of coefficient of restitution is
[{'answer': '1', 'provenance': [{'wikipedia_id': '3659503', 'title': 'Coefficient of restitution', 'start_paragraph_id': 1, 'start_character': 183, 'end_paragraph_id': 1, 'end_character': 184, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3659503', 'title': 'Coefficient of restitution', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 520, 'bleu_score': 0.9410529460440701, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4694288069957714769}, 'section': 'Section::::Abstract.'}]}]