Question: who led the charge on little round top
[{'answer': 'Col. Joshua Lawrence Chamberlain', 'provenance': [{'wikipedia_id': '1032766', 'title': 'Little Round Top', 'start_paragraph_id': 3, 'start_character': 139, 'end_paragraph_id': 3, 'end_character': 171, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1032766', 'title': 'Little Round Top', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 326, 'bleu_score': 0.5522128043408421, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10621004861513381985}, 'section': 'Section::::Abstract.'}]}]