Question: who played pete in pete's dragon 1977
[{'answer': 'Sean Marshall', 'provenance': [{'wikipedia_id': '358367', 'title': "Pete's Dragon (1977 film)", 'start_paragraph_id': 1, 'start_character': 300, 'end_paragraph_id': 1, 'end_character': 313, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '358367', 'title': "Pete's Dragon (1977 film)", 'start_paragraph_id': 15, 'start_character': 0, 'end_paragraph_id': 15, 'end_character': 102, 'bleu_score': 0.8852140475440831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15932485078660487063}, 'section': 'Section::::Cast.\n'}]}]