Question: when was the first commercial mobile phone released
[{'answer': '1949', 'provenance': [{'wikipedia_id': '1245539', 'title': 'History of mobile phones', 'start_paragraph_id': 14, 'start_character': 3, 'end_paragraph_id': 14, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Early services.:MTS.\n'}]}, {'provenance': [{'wikipedia_id': '1245539', 'title': 'History of mobile phones', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 464, 'bleu_score': 0.9076461330006561, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1414911949758029286}, 'section': 'Section::::Early services.:MTS.\n'}]}]