Question: when did the us space shuttle program began
[{'answer': '1981', 'provenance': [{'wikipedia_id': '38458', 'title': 'Space Shuttle program', 'start_paragraph_id': 1, 'start_character': 221, 'end_paragraph_id': 1, 'end_character': 225, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '38458', 'title': 'Space Shuttle program', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 404, 'bleu_score': 0.968982777549629, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11243385168879855794}, 'section': 'Section::::Abstract.'}]}]