Question: who keeps killing tree in happy death day
[{'answer': 'Lori', 'provenance': [{'wikipedia_id': '53835973', 'title': 'Happy Death Day', 'start_paragraph_id': 4, 'start_character': 255, 'end_paragraph_id': 4, 'end_character': 259, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}]