Question: when did the american civil rights movement end
[{'answer': '1968', 'provenance': [{'wikipedia_id': '49001', 'title': 'Civil rights movement', 'start_paragraph_id': 1, 'start_character': 513, 'end_paragraph_id': 1, 'end_character': 517, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]