Question: Landon T. Clay (born Landon Thomas Clay) was an American businessman and founder of the Clay Mathematics Institute (CMI),  a private, non-profit foundation, based in Peterborough, New Hampshire, in which country?
Sentence (from "Gang Tian"): His employment at Princeton started from 2003, and now he is entitled Higgins Professor of Mathematics; starting 2005, he has been the director of Beijing International Center for Mathematical Research (BICMR); he has also been Dean of School of Mathematical Sciences, Peking University since 2013.
Relevant evidence: No