Question: The Mars Society is an American worldwide volunteer-driven space-advocacy non-profit organization, inspired by "The Case for Mars" conferences which were hosted by The Mars Underground at the University of Colorado Boulder, a public research university located in Boulder, Colorado, in which country?
Sentence (from "Boulder History Museum"): In April 2013, it purchased a second property, the Masonic Lodge building at Broadway and Pine, with the goal of moving its operations to the new building in early 2018.
Relevant evidence: No