Question: who is playing batman in the new justice league movie
[{'answer': 'Ben Affleck', 'provenance': [{'wikipedia_id': '44120383', 'title': 'Justice League (film)', 'start_paragraph_id': 1, 'start_character': 360, 'end_paragraph_id': 1, 'end_character': 371, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '44120383', 'title': 'Justice League (film)', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 285, 'bleu_score': 0.61596204041678, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4144733743176816246}, 'section': 'Section::::Cast.\n'}]}]