Question: who played whitley gilbert's mom on a different world
[{'answer': 'Diahann Carroll', 'provenance': [{'wikipedia_id': '7145311', 'title': 'List of A Different World characters', 'start_paragraph_id': 29, 'start_character': 28, 'end_paragraph_id': 29, 'end_character': 43, 'bleu_score': 1.0, 'section': 'Section::::Recurring characters.\n'}]}, {'provenance': [{'wikipedia_id': '7145311', 'title': 'List of A Different World characters', 'start_paragraph_id': 29, 'start_character': 0, 'end_paragraph_id': 29, 'end_character': 302, 'bleu_score': 0.9042878500265971, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9532760982365633536}, 'section': 'Section::::Recurring characters.\n'}]}]