Question: who played kevin in we need to talk about kevin
[{'answer': 'Ezra Miller', 'provenance': [{'wikipedia_id': '17260746', 'title': 'We Need to Talk About Kevin (film)', 'start_paragraph_id': 13, 'start_character': 12, 'end_paragraph_id': 13, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Cast.\n'}]}]