Question: who is a in pretty little liars mona
[{'answer': 'Janel Parrish', 'provenance': [{'wikipedia_id': '28572034', 'title': 'Mona Vanderwaal', 'start_paragraph_id': 1, 'start_character': 175, 'end_paragraph_id': 1, 'end_character': 188, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]