Question: who did jamie campbell play in harry potter
[{'answer': 'the young Gellert Grindelwald', 'provenance': [{'wikipedia_id': '15813016', 'title': 'Jamie Campbell Bower', 'start_paragraph_id': 1, 'start_character': 221, 'end_paragraph_id': 1, 'end_character': 250, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '15813016', 'title': 'Jamie Campbell Bower', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 387, 'bleu_score': 0.736724388928591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17272525131799691384}, 'section': 'Section::::Abstract.'}]}]