Question: who did tracy barlow kill in coronation street
[{'answer': 'Charlie', 'provenance': [{'wikipedia_id': '2482945', 'title': 'Charlie Stubbs (Coronation Street)', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2482945', 'title': 'Charlie Stubbs (Coronation Street)', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 1742, 'bleu_score': 0.993537879857427, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3723364519827026549}, 'section': 'Section::::Storylines.\n'}]}]