Question: who sang sometimes i feel like a motherless child
[{'answer': 'the Fisk Jubilee Singers', 'provenance': [{'wikipedia_id': '8946969', 'title': 'Sometimes I Feel Like a Motherless Child', 'start_paragraph_id': 1, 'start_character': 226, 'end_paragraph_id': 1, 'end_character': 250, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '8946969', 'title': 'Sometimes I Feel Like a Motherless Child', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 332, 'bleu_score': 0.965203995518735, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14426391307596324557}, 'section': 'Section::::Abstract.'}]}]