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 "Washington University in St. Louis"): Washington University in St. Louis (also referred to as WashU, or WUSTL) is a private research university located in the St. Louis metropolitan area and in Missouri, United States.
Relevant evidence: Yes