Question: who sings the song to good at goodbye
[{'answer': 'Sam Smith', 'provenance': [{'wikipedia_id': '55126521', 'title': 'Too Good at Goodbyes', 'start_paragraph_id': 1, 'start_character': 51, 'end_paragraph_id': 1, 'end_character': 60, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]