Question: who was president during the sherman anti-trust act
[{'answer': 'Benjamin Harrison', 'provenance': [{'wikipedia_id': '46693', 'title': 'Sherman Antitrust Act of 1890', 'start_paragraph_id': 1, 'start_character': 171, 'end_paragraph_id': 1, 'end_character': 188, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]