Question: who signed the civil rights act of 1957
[{'answer': 'Eisenhower', 'provenance': [{'wikipedia_id': '713718', 'title': 'Civil Rights Act of 1957', 'start_paragraph_id': 1, 'start_character': 247, 'end_paragraph_id': 1, 'end_character': 257, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '713718', 'title': 'Civil Rights Act of 1957', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 305, 'bleu_score': 0.7199007793958131, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8816570787700416416}, 'section': 'Section::::Passage.\n'}]}]