Question: who is charlie writing to perks of being a wallflower
[{'answer': 'an unknown recipient', 'provenance': [{'wikipedia_id': '2162569', 'title': 'The Perks of Being a Wallflower', 'start_paragraph_id': 5, 'start_character': 83, 'end_paragraph_id': 5, 'end_character': 103, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}]