Question: who were the commanders of the battle of shiloh
[{'answer': 'Major General Ulysses S. Grant', 'provenance': [{'wikipedia_id': '144155', 'title': 'Battle of Shiloh', 'start_paragraph_id': 1, 'start_character': 233, 'end_paragraph_id': 1, 'end_character': 263, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'General Albert Sidney Johnston', 'provenance': [{'wikipedia_id': '144155', 'title': 'Battle of Shiloh', 'start_paragraph_id': 1, 'start_character': 453, 'end_paragraph_id': 1, 'end_character': 483, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '144155', 'title': 'Battle of Shiloh', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1048, 'bleu_score': 0.73356687688652, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7359243093586965357}, 'section': 'Section::::Abstract.'}]}]