Question: when did harley quinn first appear in batman comics
[{'answer': 'The Batman Adventures # 12'}, {'provenance': [{'wikipedia_id': '311899', 'title': 'Harley Quinn', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 365, 'bleu_score': 0.8459009121685561, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14238244559575941723}, 'section': 'Section::::Abstract.'}]}]