Question: who does gregg sulkin play in wizards of waverly place
[{'answer': 'Mason Greyback', 'provenance': [{'wikipedia_id': '11572925', 'title': 'Gregg Sulkin', 'start_paragraph_id': 7, 'start_character': 199, 'end_paragraph_id': 7, 'end_character': 213, 'bleu_score': 1.0, 'section': 'Section::::Career.\n'}]}, {'provenance': [{'wikipedia_id': '11572925', 'title': 'Gregg Sulkin', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 393, 'bleu_score': 0.9419253344698341, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1105143903365355465}, 'section': 'Section::::Career.\n'}]}]