Question: who directed the perks of being a wallflower
[{'answer': 'Stephen Chbosky', 'provenance': [{'wikipedia_id': '30265620', 'title': 'The Perks of Being a Wallflower (film)', 'start_paragraph_id': 1, 'start_character': 100, 'end_paragraph_id': 1, 'end_character': 115, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]