Question: who sang lean on me.in the 80's
[{'answer': 'Club Nouveau', 'provenance': [{'wikipedia_id': '4210382', 'title': 'Lean on Me (song)', 'start_paragraph_id': 17, 'start_character': 11, 'end_paragraph_id': 17, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Track listings.\n'}]}, {'provenance': [{'wikipedia_id': '4210382', 'title': 'Lean on Me (song)', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 367, 'bleu_score': 0.9731482306711111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7930807429103020470}, 'section': 'Section::::Club Nouveau version.\n'}]}]