Question: what is the killing curse in harry potter called
[{'answer': 'Avada Kedavra', 'provenance': [{'wikipedia_id': '310355', 'title': 'Magic in Harry Potter', 'start_paragraph_id': 113, 'start_character': 517, 'end_paragraph_id': 113, 'end_character': 530, 'bleu_score': 1.0, 'section': 'Section::::Spell-like effects.:Priori Incantatem.\n'}]}]