Question: who signed the voting rights act of 1965
[{'answer': 'Lyndon B. Johnson', 'provenance': [{'wikipedia_id': '55791', 'title': 'Voting Rights Act of 1965', 'start_paragraph_id': 1, 'start_character': 178, 'end_paragraph_id': 1, 'end_character': 195, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '55791', 'title': 'Voting Rights Act of 1965', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 728, 'bleu_score': 0.9530446225172671, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14382843272145485485}, 'section': 'Section::::Abstract.'}]}]