Question: who sings it must have been love in pretty woman
[{'answer': 'Roxette', 'provenance': [{'wikipedia_id': '575457', 'title': 'It Must Have Been Love', 'start_paragraph_id': 1, 'start_character': 94, 'end_paragraph_id': 1, 'end_character': 101, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]