Question: who played pink in the movie the wall
[{'answer': 'Bob Geldof', 'provenance': [{'wikipedia_id': '1539714', 'title': 'Pink Floyd – The Wall', 'start_paragraph_id': 35, 'start_character': 682, 'end_paragraph_id': 35, 'end_character': 692, 'bleu_score': 1.0, 'section': 'Section::::Production.:Development.\n'}]}, {'answer': 'Kevin McKeon', 'provenance': [{'wikipedia_id': '1539714', 'title': 'Pink Floyd – The Wall', 'start_paragraph_id': 13, 'start_character': 12, 'end_paragraph_id': 13, 'end_character': 24, 'bleu_score': 1.0, 'section': 'Section::::Cast.\n'}]}, {'answer': 'David Bingham', 'provenance': [{'wikipedia_id': '1539714', 'title': 'Pink Floyd – The Wall', 'start_paragraph_id': 14, 'start_character': 12, 'end_paragraph_id': 14, 'end_character': 25, 'bleu_score': 1.0, 'section': 'Section::::Cast.\n'}]}]