Question: who played nick the bartender in it's a wonderful life
[{'answer': 'Sheldon Leonard', 'provenance': [{'wikipedia_id': '60164', 'title': "It's a Wonderful Life", 'start_paragraph_id': 43, 'start_character': 12, 'end_paragraph_id': 43, 'end_character': 27, 'bleu_score': 1.0, 'section': 'Section::::Cast.:Credited.\n'}]}]