Question: who wrote go tell it on the mountain song
[{'answer': 'John Wesley Work , Jr.'}, {'provenance': [{'wikipedia_id': '5847710', 'title': 'Go Tell It on the Mountain (song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 297, 'bleu_score': 0.9611463610973231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16103697123790171059}, 'section': 'Section::::Abstract.'}]}]