Question: who sang the original nights in white satin
[{'answer': 'the Moody Blues', 'provenance': [{'wikipedia_id': '2015929', 'title': 'Nights in White Satin', 'start_paragraph_id': 1, 'start_character': 37, 'end_paragraph_id': 1, 'end_character': 52, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2015929', 'title': 'Nights in White Satin', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 486, 'bleu_score': 0.978138775770484, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11682370381839695905}, 'section': 'Section::::Abstract.'}]}]