question: Who founded the university where one would find Gerd B. Müller as head of a branch of biology?
answer: Duke Rudolph IV
context: Title: University of Vienna
  Passage: The University of Vienna (German: "Universität Wien" ) is a public university located in Vienna, Austria.  It was founded by Duke Rudolph IV in 1365 and is one of the oldest universities in the German-speaking world.  With its long and rich history, the University of Vienna has developed into one of the biggest universities in Europe, and also one of the most renowned, especially in the Humanities.  It is associated with 15 Nobel prize winners and has been the academic home of a large number of figures both of historical and academic importance.
  Title: Gerd B. Müller
  Passage: Gerd B. Müller (born 1953) is an Austrian biologist who is professor at the University of Vienna where he heads the Department of Theoretical Biology in the Center for Organismal Systems Biology.  His research interests focus on vertebrate limb development, evolutionary novelties, evo-devo theory, and the Extended Evolutionary Synthesis.  He is also concerned with the development of 3D based imaging tools in developmental biology.
  Title: Sunday O. Fadulu
  Passage: Dr. Sunday O. Fadulu is a noted microbiologist and medical researcher most recognized for his work with sickle cell anemia.  He holds a patent for the treatment of the disease which claimed the lives of two of his brothers in Nigeria.  Fadulu enrolled at Oklahoma Baptist University in 1961, with the encouragement of a Southern Baptist missionary he met.  Speaking of his father and the death of his brothers, he has stated, "My father was a man who would never fail.  He was so strong," Fadulu said in the chapel service.  "The night my brother died, he had my brother in his arms, and I saw his face, and it said that he had failed.  I remember the discouragement on his face.  I said then that I would find a cure and to do that I would have to go to America."  Fadulu's research used an extract of the African "chewing stick," which he discovered, reverses sickling of red blood cells.  The extract also provides protection from the disease.  Medication for treating sickle cell anemia has been through the first phases of approval through the Federal Food and Drug Administration.
citations: Gerd B. Müller University of Vienna