Question: who did josh brolin play in avengers age of ultron
[{'answer': 'Thanos', 'provenance': [{'wikipedia_id': '36484254', 'title': 'Avengers: Age of Ultron', 'start_paragraph_id': 10, 'start_character': 24, 'end_paragraph_id': 10, 'end_character': 30, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '36484254', 'title': 'Avengers: Age of Ultron', 'start_paragraph_id': 29, 'start_character': 0, 'end_paragraph_id': 29, 'end_character': 1148, 'bleu_score': 0.895583580576893, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1928984155937410005}, 'section': 'Section::::Cast.\n'}]}]