Task: Question Generation
Input (English): Passage: Chiyo Sakamoto, a young girl from a poverty-stricken fishing village, is sold along with her older sister Satsu into a life of servitude by her aging father. Chiyo is taken in by Kayoko Nitta, the Mother (proprietress) of a geisha house in Gion, one of the most prominent geisha districts in Kyoto, whereas Satsu is sold to a prostitution brothel.
At the okiya, Chiyo meets another young girl named Pumpkin, the cranky Granny, the gentler Auntie, and the okiya's only working geisha, Hatsumomo, who is famous for her breathtaking beauty. Chiyo soon discovers Hatsumomo is secretly a cruel and jealous woman that views Chiyo as a potential rival due to her striking bluish-gray eyes, along with being a change in Mother's future financial dependence. Hatsumomo then goes out of her way to deliberately make Chiyo's new life miserable by having her take the blame for everything and intentionally withholding information of her sister's whereabouts in the pleasure district. However, Auntie is aware of this and warns Chiyo against trusting and angering Hatsumomo, given her history with the ill-mannered geisha.
Output (English): What is the first name of the sister of the woman sold to the prostitution brothel?