Question: who sang mary did you know in the movie son of god
[{'answer': 'Cee Lo Green', 'provenance': [{'wikipedia_id': '2859825', 'title': 'Mary, Did You Know?', 'start_paragraph_id': 13, 'start_character': 11, 'end_paragraph_id': 13, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Clay Aiken version.\n'}]}]