Task: Question Generation
Input (English): Passage: Several local celebrities purchased units in the building, including numerous professional athletes and artists. Juwan Howard, Rex Grossman (who has put his unit on the market), Patrick Kane and R. Kelly are among the purchasers of Trump properties. Derrick Rose purchased a $2.8 million 3,102-square-foot (288.2 m2) condo in spring 2012. Other prominent purchasers of units included McDonald's Chief Executive and President Don Thompson and WMAQ-TV (NBC 5 Chicago) president and general manager David Doebler. United Airlines CEO Jeff Smisek and Huron Consulting Group CEO James Roth also purchased properties in the building.Two units on the 87th and 88th floors sold for prices in excess of $5 million in 2009 directly from the developer. After a few soft years in the real estate market, it took until August 2014, for units to sell for prices in excess of $1000 per square foot. Two units sold for over $3 million that month including a $3.99 million sale, which was the highest sale price in the building since 2009. The penthouse sold for $17 million in late 2014 to Sanjay Shah, the founder and CEO of Vistex.In May 2016, a one-bedroom unit with a parking space became the first listed Chicago one-bedroom unit to fetch over $1,100-a-square-foot when Mark and Deborah Hellman moved their interests from a one-bedroom to a two-bedroom unit in the building.  Overall, however, real estate observers noticed a slowdown in Trump Tower sales due to the controversial nature of the Donald Trump presidential campaign, 2016: prospective buyers who were happy with the actual tower residences were unsure they wanted to be associated with the Trump name.
Output (English): What is the name of the building in which several local celebrities purchased units?