Question: who was the commander of the british forces in boston
[{'answer': 'William Howe', 'provenance': [{'wikipedia_id': '218883', 'title': 'William Howe, 5th Viscount Howe', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '218883', 'title': 'William Howe, 5th Viscount Howe', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 273, 'bleu_score': 0.9569637990759251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13820987942943572142}, 'section': 'Section::::Abstract.'}]}]