Question: when was chasing cars played in grey's anatomy
[{'answer': 'second season finale', 'provenance': [{'wikipedia_id': '18993902', 'title': 'Chasing Cars', 'start_paragraph_id': 1, 'start_character': 366, 'end_paragraph_id': 1, 'end_character': 386, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18993902', 'title': 'Chasing Cars', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 460, 'bleu_score': 0.9325219909215741, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17614535305565472016}, 'section': 'Section::::Abstract.'}]}]