Question: Who composed the track not released as a single on Andy Williams' Greatest Hits Vol. 2?
{'answer': 'Mitch Leigh', 'supporting_facts': [["Andy Williams' Greatest Hits Vol. 2", 0], ["Andy Williams' Greatest Hits Vol. 2", 1], ["Andy Williams' Greatest Hits Vol. 2", 3], ['The Impossible Dream (The Quest)', 0]]}