Question: where did dr burke go in grey's anatomy
[{'answer': 'Zürich', 'provenance': [{'wikipedia_id': '9019239', 'title': 'Preston Burke', 'start_paragraph_id': 9, 'start_character': 47, 'end_paragraph_id': 9, 'end_character': 53, 'bleu_score': 1.0, 'section': 'Section::::Storylines.\n'}]}, {'provenance': [{'wikipedia_id': '9019239', 'title': 'Preston Burke', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 676, 'bleu_score': 0.9831208473513011, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7848146388822687980}, 'section': 'Section::::Storylines.\n'}]}]