Question: Which University is ranked 20th in the world in 2017 by the Academic Ranking of World Universities, California Institute of Technology or Washington University in St. Louis?
Sentence (from "University of Oslo"): The University of Oslo (Norwegian: "Universitetet i Oslo" ), until 1939 named the Royal Frederick University (Norwegian: "Det Kongelige Frederiks Universitet" ), is the oldest university in Norway, located in the Norwegian capital of Oslo.
Relevant evidence: No