Question: when was the civil rights act of 1964 proposed
[{'answer': 'June 11 , 1963', 'provenance': [{'wikipedia_id': '188746', 'title': 'Civil Rights Act of 1964', 'start_paragraph_id': 12, 'start_character': 3, 'end_paragraph_id': 12, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::History.:House of Representatives.\n'}]}, {'provenance': [{'wikipedia_id': '188746', 'title': 'Civil Rights Act of 1964', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 658, 'bleu_score': 0.782511484989442, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8534914292537629425}, 'section': 'Section::::Background.\n'}]}]