Question: who played magneto in days of future past
[{'answer': 'Michael Fassbender', 'provenance': [{'wikipedia_id': '36613262', 'title': 'X-Men: Days of Future Past', 'start_paragraph_id': 1, 'start_character': 786, 'end_paragraph_id': 1, 'end_character': 804, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Ian McKellen', 'provenance': [{'wikipedia_id': '36613262', 'title': 'X-Men: Days of Future Past', 'start_paragraph_id': 1, 'start_character': 879, 'end_paragraph_id': 1, 'end_character': 891, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]