Question: who sings the song ain't no stopping us now
[{'answer': 'McFadden & Whitehead', 'provenance': [{'wikipedia_id': '14225263', 'title': "Ain't No Stoppin' Us Now", 'start_paragraph_id': 1, 'start_character': 69, 'end_paragraph_id': 1, 'end_character': 89, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '14225263', 'title': "Ain't No Stoppin' Us Now", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 570, 'bleu_score': 0.9806740509884301, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3267080557115688271}, 'section': 'Section::::Abstract.'}]}]