Question: The Federal University of Rio de Janeiro, is a public university in the state of Rio de Janeiro, in which country, in 2015, "QS World University Rankings" ranked UFRJ as the best Brazilian federal university?
Sentence (from "Federal University of Rio de Janeiro"): In 2015 the Ranking Universitário Folha (RUF) ranked UFRJ as the second best university in Brazil and the best Federal University in the country.
Relevant evidence: No