Question: who plays greg heffley in diary of a wimpy kid
[{'answer': 'Zachary Adam Gordon', 'provenance': [{'wikipedia_id': '14763763', 'title': 'Zachary Gordon', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '14763763', 'title': 'Zachary Gordon', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 305, 'bleu_score': 0.694427581710744, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8272648380181428871}, 'section': 'Section::::Abstract.'}]}]