Question: when was the first nokia mobile phone invented
[{'answer': '1981', 'provenance': [{'wikipedia_id': '47107872', 'title': 'History of Nokia', 'start_paragraph_id': 21, 'start_character': 255, 'end_paragraph_id': 21, 'end_character': 259, 'bleu_score': 1.0, 'section': 'Section::::Nokia corporation.:Nordic mobile telephone (1G).\n'}]}, {'provenance': [{'wikipedia_id': '47107872', 'title': 'History of Nokia', 'start_paragraph_id': 21, 'start_character': 0, 'end_paragraph_id': 21, 'end_character': 350, 'bleu_score': 0.7878096320039041, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14492117993941370672}, 'section': 'Section::::Nokia corporation.:Nordic mobile telephone (1G).\n'}]}]