Question: who sings it must have been love but it's over now
[{'answer': 'the Swedish pop duo Roxette', 'provenance': [{'wikipedia_id': '575457', 'title': 'It Must Have Been Love', 'start_paragraph_id': 1, 'start_character': 74, 'end_paragraph_id': 1, 'end_character': 101, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '575457', 'title': 'It Must Have Been Love', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 280, 'bleu_score': 0.9325718821645921, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2606649726091914054}, 'section': 'Section::::Abstract.'}]}]