Which astronomer put the sun rather than the Earth at the center of things in a book published in 1543?
Which composer wrote the opera Nabucco, which premiered at La Scala in 1842?
Music
What instrument is Yo-Yo Ma famous for playing?
What colour is the light at the top of a standard vertical traffic signal?
General
Which Homeric epic follows a Greek king's ten-year voyage home to Ithaca?
Literature