Input question: What is the name of the bike used to set the pace in a Keirin race in any indoor cycling race?

Output answer: derny

Input question: Which EU country's national anthem, "The Royal March", has no official words?

Output answer: spain

Input question: A project led by broadcaster NHK and Tobu Railway Co, which city's 'Skytree' opened as the world's tallest self-supporting tower and 2nd largest building in 2012?

Output answer: tokyo

Input question: In ancient Greece whose warriors were called The Myrmidons?

Output answer:
achilles