Question: when did gps become available for civilian use
[{'answer': '1980s', 'provenance': [{'wikipedia_id': '11866', 'title': 'Global Positioning System', 'start_paragraph_id': 3, 'start_character': 186, 'end_paragraph_id': 3, 'end_character': 191, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '11866', 'title': 'Global Positioning System', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 781, 'bleu_score': 0.7252862409358231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7801616689074731573}, 'section': 'Section::::Abstract.'}]}]