Question: who sang the song solid as a rock
[{'answer': 'Ashford & Simpson', 'provenance': [{'wikipedia_id': '15985890', 'title': 'Solid (song)', 'start_paragraph_id': 1, 'start_character': 63, 'end_paragraph_id': 1, 'end_character': 80, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '15985890', 'title': 'Solid (song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 178, 'bleu_score': 0.615275581609516, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13575061012347493347}, 'section': 'Section::::Abstract.'}]}]