Question: who rode ahead of the british army to warn them that they were marching
[{'answer': 'Paul Revere', 'provenance': [{'wikipedia_id': '4321886', 'title': 'Battles of Lexington and Concord', 'start_paragraph_id': 3, 'start_character': 558, 'end_paragraph_id': 3, 'end_character': 569, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Samuel Prescott', 'provenance': [{'wikipedia_id': '4321886', 'title': 'Battles of Lexington and Concord', 'start_paragraph_id': 3, 'start_character': 574, 'end_paragraph_id': 3, 'end_character': 589, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4321886', 'title': 'Battles of Lexington and Concord', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 801, 'bleu_score': 0.9651324673660481, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7418289387657090500}, 'section': 'Section::::Abstract.'}]}]