Question: who won best actor in the academy awards this year
[{'answer': 'Gary Oldman'}, {'provenance': [{'wikipedia_id': '23245410', 'title': 'Academy Award for Best Actor', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 342, 'bleu_score': 0.623381380088434, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9813654027405619084}, 'section': 'Section::::Abstract.'}]}]