Question: who sang sister mary robert in sister act
[{'answer': 'Andrea Robinson', 'provenance': [{'wikipedia_id': '19255493', 'title': 'Andrea Robinson (singer)', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19255493', 'title': 'Andrea Robinson (singer)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 407, 'bleu_score': 0.896751465704636, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12441349149868624337}, 'section': 'Section::::Abstract.'}]}]