Question: who was president when the panama canal opened
[{'answer': 'Woodrow Wilson', 'provenance': [{'wikipedia_id': '2869783', 'title': 'History of the Panama Canal', 'start_paragraph_id': 68, 'start_character': 165, 'end_paragraph_id': 68, 'end_character': 179, 'bleu_score': 1.0, 'section': 'Section::::United States.:Opening.\n'}]}, {'provenance': [{'wikipedia_id': '2869783', 'title': 'History of the Panama Canal', 'start_paragraph_id': 68, 'start_character': 0, 'end_paragraph_id': 68, 'end_character': 425, 'bleu_score': 0.972407137066537, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7968713741006796816}, 'section': 'Section::::United States.:Opening.\n'}]}]