Question: who sang the original ain't no mountain high enough
[{'answer': 'Marvin Gaye and Tammi Terrell', 'provenance': [{'wikipedia_id': '1682828', 'title': "Ain't No Mountain High Enough", 'start_paragraph_id': 1, 'start_character': 224, 'end_paragraph_id': 1, 'end_character': 253, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1682828', 'title': "Ain't No Mountain High Enough", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 457, 'bleu_score': 0.9562104553719301, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2010962073270617291}, 'section': 'Section::::Abstract.'}]}]