Question: who sang the original la vie en rose
[{'answer': 'Édith Piaf', 'provenance': [{'wikipedia_id': '3941629', 'title': 'La Vie en rose', 'start_paragraph_id': 1, 'start_character': 69, 'end_paragraph_id': 1, 'end_character': 79, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]