Question: when was the first mobile cell phone invented
[{'answer': '1908', 'provenance': [{'wikipedia_id': '1245539', 'title': 'History of mobile phones', 'start_paragraph_id': 5, 'start_character': 116, 'end_paragraph_id': 5, 'end_character': 120, 'bleu_score': 1.0, 'section': 'Section::::Predecessors.\n'}]}, {'provenance': [{'wikipedia_id': '1245539', 'title': 'History of mobile phones', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 848, 'bleu_score': 0.959893969644335, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3684454864656759837}, 'section': 'Section::::Predecessors.\n'}]}]