Question: who led the british in the battle of princeton
[{'answer': 'Lieutenant Colonel Charles Mawhood', 'provenance': [{'wikipedia_id': '218910', 'title': 'Battle of Princeton', 'start_paragraph_id': 1, 'start_character': 249, 'end_paragraph_id': 1, 'end_character': 283, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '218910', 'title': 'Battle of Princeton', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 915, 'bleu_score': 0.880481075519935, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1203932151148344598}, 'section': 'Section::::Abstract.'}]}]