Question: who kills tywin lannister in game of thrones
[{'answer': 'Tyrion', 'provenance': [{'wikipedia_id': '1411081', 'title': 'Tywin Lannister', 'start_paragraph_id': 2, 'start_character': 239, 'end_paragraph_id': 2, 'end_character': 245, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1411081', 'title': 'Tywin Lannister', 'start_paragraph_id': 37, 'start_character': 0, 'end_paragraph_id': 37, 'end_character': 1087, 'bleu_score': 0.9896637358043451, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17002349763479464773}, 'section': 'Section::::TV adaptation.:Season 4.\n'}]}]