Question: when was the first commercial cell phone released
[{'answer': '1983', 'provenance': [{'wikipedia_id': '1245539', 'title': 'History of mobile phones', 'start_paragraph_id': 38, 'start_character': 988, 'end_paragraph_id': 38, 'end_character': 992, 'bleu_score': 1.0, 'section': 'Section::::Emergence of automated services.\n'}]}, {'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': 51, 'start_character': 0, 'end_paragraph_id': 51, 'end_character': 371, 'bleu_score': 0.9720210313175831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9548547227878013633}, 'section': 'Section::::The early generations.:1G – Analog cellular.\n'}]}, {'provenance': [{'wikipedia_id': '1245539', 'title': 'History of mobile phones', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9548547227878013633}, 'section': 'Section::::Abstract.'}]}, {'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': 9548547227878013633}, 'section': 'Section::::Handheld mobile phone.\n'}]}, {'provenance': [{'wikipedia_id': '1245539', 'title': 'History of mobile phones', 'section': 'Section::::The cellular concept.\n', 'start_paragraph_id': 36, 'end_paragraph_id': 36, 'meta': {'evidence_span': ['A cellular telephone switching plan was described by Fluhr and Nussbaum in 1973, and a cellular telephone data signaling system was described in 1977 by Hachenburg et al.', 'A cellular telephone switching plan was described by Fluhr and Nussbaum in 1973, and a cellular telephone data signaling system was described in 1977 by Hachenburg et al.']}}]}, {'provenance': [{'wikipedia_id': '19644137', 'title': 'Mobile phone', 'section': 'Section::::Abstract.', 'start_paragraph_id': 2, 'end_paragraph_id': 2, 'meta': {'evidence_span': ['1983', "The first handheld mobile phone was demonstrated by John F. Mitchell and Martin Cooper of Motorola in 1973, using a handset weighing c. 2\xa0kilograms (4.4 lbs). In 1979, Nippon Telegraph and Telephone (NTT) launched the world's first cellular network in Japan. In 1983, the DynaTAC 8000x was the first commercially available handheld mobile phone. From 1983 to 2014, worldwide mobile phone subscriptions grew to over seven billionenough to provide one for every person on Earth.", "The first handheld mobile phone was demonstrated by John F. Mitchell and Martin Cooper of Motorola in 1973, using a handset weighing c. 2\xa0kilograms (4.4 lbs). In 1979, Nippon Telegraph and Telephone (NTT) launched the world's first cellular network in Japan. In 1983, the DynaTAC 8000x was the first commercially available handheld mobile phone. From 1983 to 2014,"]}}]}, {'provenance': [{'wikipedia_id': '2705671', 'title': 'Ameritech Cellular', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['1983', 'Cell service became publicly available in Chicago on October 13, 1983.']}}]}]