Question: who is the dirty boy on charlie brown
[{'answer': 'Pig - Pen', 'provenance': [{'wikipedia_id': '1032007', 'title': 'Pig-Pen', 'start_paragraph_id': 12, 'start_character': 1, 'end_paragraph_id': 12, 'end_character': 9, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '1032007', 'title': 'Pig-Pen', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 159, 'bleu_score': 0.728013404408133, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8621081278814018540}, 'section': 'Section::::Abstract.'}]}]