Question: who played little duck in the five heartbeats
[{'answer': 'Robert Townsend', 'provenance': [{'wikipedia_id': '1625009', 'title': 'The Five Heartbeats', 'start_paragraph_id': 1, 'start_character': 61, 'end_paragraph_id': 1, 'end_character': 76, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1625009', 'title': 'The Five Heartbeats', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 396, 'bleu_score': 0.930807147807393, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11462392133355653469}, 'section': 'Section::::Cast and characters.:The Five Heartbeats.\n'}]}]