Question: when did the lead singer of joy division die
[{'answer': '18 May 1980', 'provenance': [{'wikipedia_id': '40547', 'title': 'Ian Curtis', 'start_paragraph_id': 1, 'start_character': 33, 'end_paragraph_id': 1, 'end_character': 44, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '40547', 'title': 'Ian Curtis', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 249, 'bleu_score': 0.569772834811173, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1042031013696310733}, 'section': 'Section::::Abstract.'}]}]