Question: who played igor in the movie young frankenstein
[{'answer': 'Marty Feldman', 'provenance': [{'wikipedia_id': '442647', 'title': 'Young Frankenstein', 'start_paragraph_id': 1, 'start_character': 272, 'end_paragraph_id': 1, 'end_character': 285, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]