Question: who plays batman in the 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': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 775, 'bleu_score': 0.747794133802075, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14904102945883191257}, 'section': 'Section::::Abstract.'}]}]