Question: who is the voice of batman in lego batman movie
[{'answer': 'Will Arnett', 'provenance': [{'wikipedia_id': '44079493', 'title': 'The Lego Batman Movie', 'start_paragraph_id': 1, 'start_character': 735, 'end_paragraph_id': 1, 'end_character': 746, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '44079493', 'title': 'The Lego Batman Movie', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 47, 'bleu_score': 0.6803749333171201, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9760996105976212681}, 'section': 'Section::::Voice Cast.\n'}]}]