Question: who was president of the united states in 1963
[{'answer': 'Lyndon Baines Johnson', 'provenance': [{'wikipedia_id': '54533', 'title': 'Lyndon B. Johnson', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '54533', 'title': 'Lyndon B. Johnson', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 563, 'bleu_score': 0.7270382752568391, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10517457384895147043}, 'section': 'Section::::Abstract.'}]}]