Input question: What name appears on the postage stamps of Switzerland?

Output answer: helvetia

Input question: Leonid Brezhnev led the Soviet Union as General Secretary then as Chairman of the Presidium, the longest term as leader since Josef Stalin; who was his immediate successor?

Output answer: yuri andropov

Input question: First introduced commercially by Wham-O in 1957, what toy, which consistently makes the list of top toys ever, consists of a plastic ring 28 inches or 40 inches in diameter?

Output answer: hula hoop

Input question: In what city did Barack Obama formally accept the Democratic nomination for the US presidential election?

Output answer:
denver colorado