Question: who is the original singer of this christmas
[{'answer': 'American soul musician Donny Hathaway', 'provenance': [{'wikipedia_id': '5036692', 'title': 'This Christmas (Donny Hathaway song)', 'start_paragraph_id': 1, 'start_character': 30, 'end_paragraph_id': 1, 'end_character': 67, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5036692', 'title': 'This Christmas (Donny Hathaway song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 429, 'bleu_score': 0.9716239638199891, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18408001404092448600}, 'section': 'Section::::Abstract.'}]}]