Question: what general won a huge victory at vicksburg
[{'answer': 'Grant', 'provenance': [{'wikipedia_id': '30098820', 'title': 'Ulysses S. Grant and the American Civil War', 'start_paragraph_id': 0, 'start_character': 11, 'end_paragraph_id': 0, 'end_character': 16, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '30098820', 'title': 'Ulysses S. Grant and the American Civil War', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 1314, 'bleu_score': 0.532835137054755, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9924582518880287928}, 'section': 'Section::::American Civil War.:The Battle of Vicksburg.\n'}]}]