Question: who sang can't help falling in love first
[{'answer': 'Elvis Presley', 'provenance': [{'wikipedia_id': '1359467', 'title': "Can't Help Falling in Love", 'start_paragraph_id': 1, 'start_character': 72, 'end_paragraph_id': 1, 'end_character': 85, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]