Question: who was the successful commanding general of the northern forces in the civil war
[{'answer': 'George B. McClellan', 'provenance': [{'wikipedia_id': '104977', 'title': 'George B. McClellan', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '104977', 'title': 'George B. McClellan', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1184748956564796729}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6511466', 'title': 'George W. Johnson (governor)', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['George Washington Johnson (May 27, 1811April 8, 1862) was the first Confederate governor of Kentucky. A lawyer-turned-farmer from Scott County, Kentucky, Johnson favored secession as a means of preventing the Civil War, believing the Union and Confederacy would be forces of equal strength, each too wary to attack the other. As political sentiment in the Commonwealth took a decidedly Union turn following the elections of 1861, Johnson was instrumental in organizing a sovereignty convention in Russellville, Kentucky with the intent of "severing forever our connection with the Federal Government." The convention created a Confederate shadow government for the Commonwealth, and Johnson was elected its governor.', 'eorge Washington Johnson (May 27, 1811April 8, 1862) was the first Confederate governor of Kentucky. A lawyer-turned-farmer from Scott County, Kentucky, Johnson favored secession as a means of preventing the Civil War, believing the Union and Confederacy would be forces of equal strength, each too wary to attack the other.']}}]}]