Answer the question from the given passage. Your answer should be directly extracted from the passage, and it should be a single entity, name, or number, not a sentence.

Input: Consider Input: Passage: The university runs a number of academic institutions and programs apart from its undergraduate and postgraduate schools. It operates the University of Chicago Laboratory Schools (a private day school for K-12 students and day care), the Sonia Shankman Orthogenic School (a residential treatment program for those with behavioral and emotional problems), and four public charter schools on the South Side of Chicago administered by the university's Urban Education Institute. In addition, the Hyde Park Day School, a school for students with learning disabilities, maintains a location on the University of Chicago campus. Since 1983, the University of Chicago has maintained the University of Chicago School Mathematics Project, a mathematics program used in urban primary and secondary schools. The university runs a program called the Council on Advanced Studies in the Social Sciences and Humanities, which administers interdisciplinary workshops to provide a forum for graduate students, faculty, and visiting scholars to present scholarly work in progress. The university also operates the University of Chicago Press, the largest university press in the United States. Question: What does the Urban Education Institute help run?

Output: four public charter schools


Input: Consider Input: Passage: The invasions of Baghdad, Samarkand, Urgench, Kiev, Vladimir among others caused mass murders, such as when portions of southern Khuzestan were completely destroyed. His descendant Hulagu Khan destroyed much of Iran's northern part and sacked Baghdad although his forces were halted by the Mamluks of Egypt, but Hulagu's descendant Ghazan Khan would return to beat the Egyptian Mamluks right out of Levant, Palestine and even Gaza. According to the works of the Persian historian Rashid-al-Din Hamadani, the Mongols killed more than 70,000 people in Merv and more than 190,000 in Nishapur. In 1237 Batu Khan, a grandson of Genghis Khan, launched an invasion into Kievan Rus'. Over the course of three years, the Mongols destroyed and annihilated all of the major cities of Eastern Europe with the exceptions of Novgorod and Pskov. Question: Which descendant of Genghis Khan sacked Baghdad?

Output: Hulagu Khan


Input: Consider Input: Passage: Disorders of the immune system can result in autoimmune diseases, inflammatory diseases and cancer. Immunodeficiency occurs when the immune system is less active than normal, resulting in recurring and life-threatening infections. In humans, immunodeficiency can either be the result of a genetic disease such as severe combined immunodeficiency, acquired conditions such as HIV/AIDS, or the use of immunosuppressive medication. In contrast, autoimmunity results from a hyperactive immune system attacking normal tissues as if they were foreign organisms. Common autoimmune diseases include Hashimoto's thyroiditis, rheumatoid arthritis, diabetes mellitus type 1, and systemic lupus erythematosus. Immunology covers the study of all aspects of the immune system. Question: When does immunodeficiency occur?
Output: when the immune system is less active than normal