Question: who played moaning myrtle in the harry potter movies
[{'answer': 'Shirley Henderson', 'provenance': [{'wikipedia_id': '2298825', 'title': 'Shirley Henderson', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]