Question: where was civil rights act of 1964 signed
[{'answer': 'at the White House', 'provenance': [{'wikipedia_id': '188746', 'title': 'Civil Rights Act of 1964', 'start_paragraph_id': 3, 'start_character': 395, 'end_paragraph_id': 3, 'end_character': 413, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '188746', 'title': 'Civil Rights Act of 1964', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 413, 'bleu_score': 0.811708791266031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10704518869714949705}, 'section': 'Section::::Abstract.'}]}]