Question: when did congress pass the voting rights act
[{'answer': 'August 6 , 1965', 'provenance': [{'wikipedia_id': '55791', 'title': 'Voting Rights Act of 1965', 'start_paragraph_id': 1, 'start_character': 246, 'end_paragraph_id': 1, 'end_character': 261, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]