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's undergraduate program is ranked 18th by "U.S. News & World Report" in 2018 and 11th by the Wall Street Journal in their 2018 rankings.
Relevant evidence: No