Question: who plays thanos in the first avengers movie
[{'answer': 'Damion Poitier', 'provenance': [{'wikipedia_id': '701741', 'title': 'Thanos', 'start_paragraph_id': 2, 'start_character': 70, 'end_paragraph_id': 2, 'end_character': 84, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '701741', 'title': 'Thanos', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 350, 'bleu_score': 0.660299631283082, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5252136726923192823}, 'section': 'Section::::Abstract.'}]}]