Question: who is the actor who plays the bfg
[{'answer': 'Mark Rylance', 'provenance': [{'wikipedia_id': '43101237', 'title': 'The BFG (2016 film)', 'start_paragraph_id': 1, 'start_character': 233, 'end_paragraph_id': 1, 'end_character': 245, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '43101237', 'title': 'The BFG (2016 film)', 'start_paragraph_id': 13, 'start_character': 12, 'end_paragraph_id': 13, 'end_character': 195, 'bleu_score': 0.7007928523136331, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12825643697043874104}, 'section': 'Section::::Cast.\n'}]}]