user: Question: What was the division when Jim O'Brien was the head coach and the team finished 2nd in the division?
Columns: ['Season', 'Conf.', 'Conf. finish', 'Div.', 'Div. Finish', 'Head coach']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1946–47', '—', '—', 'Eastern', '5th', 'John Russell']
SQL:

assistant: SELECT "Div." FROM "Table" WHERE "Div. Finish" = '2nd' AND "Head coach" = 'Jim O''Brien';