Question: In what country were the second Summer Olympics at which Hanna Titimets represented Ukraine celebrated?
Sentence (from "2016 Summer Olympics"): The 2016 Summer Olympics (Portuguese: "Jogos Olímpicos de Verão de 2016" ), officially known as the Games of the XXXI Olympiad and commonly known as Rio 2016, was a major international multi-sport event celebrated in Rio de Janeiro, Brazil, from 5 to 21 August 2016.
Relevant evidence: Yes