Question: What did a niece of Cissy Houston became a United Nations Global Ambassador for?
Sentence (from "Nanguyalai Tarzi"): Nanguyalai Tarzi (Persian: ننگیالی طرزی‎ ‎ , Pashto: ننگیالی طرزی‎ ) – is a high-ranking Afghan diplomat who is the Afghan Ambassador to Switzerland and Permanent Representative to the United Nations office and other international organisations based in Geneva.
Relevant evidence: No