Question: who plays the title character in the john wick franchise
[{'answer': 'Keanu Reeves', 'provenance': [{'wikipedia_id': '53769234', 'title': 'John Wick', 'start_paragraph_id': 1, 'start_character': 210, 'end_paragraph_id': 1, 'end_character': 222, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]