Question: when did the british army start using the sa80
[{'answer': '1987', 'provenance': [{'wikipedia_id': '84350', 'title': 'SA80', 'start_paragraph_id': 1, 'start_character': 219, 'end_paragraph_id': 1, 'end_character': 223, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '84350', 'title': 'SA80', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 536, 'bleu_score': 0.556449476065865, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3355428485464945952}, 'section': 'Section::::Abstract.'}]}]