Question: who sings if you leave don't look back
[{'answer': 'Orchestral Manoeuvres in the Dark', 'provenance': [{'wikipedia_id': '10046923', 'title': 'If You Leave (song)', 'start_paragraph_id': 1, 'start_character': 60, 'end_paragraph_id': 1, 'end_character': 93, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '10046923', 'title': 'If You Leave (song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 319, 'bleu_score': 0.9657992495762461, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4613611030156078611}, 'section': 'Section::::Abstract.'}]}]