Question: who killed sara lance in arrow season 3
[{'answer': 'Thea', 'provenance': [{'wikipedia_id': '45244123', 'title': 'Sara Lance', 'start_paragraph_id': 7, 'start_character': 114, 'end_paragraph_id': 7, 'end_character': 118, 'bleu_score': 1.0, 'section': 'Section::::Appearances.:"Arrow".\n'}]}, {'provenance': [{'wikipedia_id': '45244123', 'title': 'Sara Lance', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 327, 'bleu_score': 0.7768349491984511, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9665709149829634838}, 'section': 'Section::::Appearances.:"Arrow".\n'}]}]