Question: when was the first cell phone came out
[{'answer': '1973', 'provenance': [{'wikipedia_id': '1245539', 'title': 'History of mobile phones', 'start_paragraph_id': 36, 'start_character': 75, 'end_paragraph_id': 36, 'end_character': 79, 'bleu_score': 1.0, 'section': 'Section::::The cellular concept.\n'}]}, {'provenance': [{'wikipedia_id': '1245539', 'title': 'History of mobile phones', 'start_paragraph_id': 44, 'start_character': 0, 'end_paragraph_id': 44, 'end_character': 507, 'bleu_score': 0.8049160564261061, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17195820821938694962}, 'section': 'Section::::Handheld mobile phone.\n'}]}]