Input question: What is the name for the phenomenon that causes a spectrum of light to appear in the sky when the sun shines onto droplets of moisture in the Earth's atmosphere?

Output answer: rainbow

Input question: Name the US general and commander of Nato forces in Afghanistan sacked by Barack Obama in 2010?

Output answer: stanley mcchrystal

Input question: Who won the 2008 Men's Singles Final at Wimbledon?

Output answer: rafael nadal

Input question: By what name is the medical condition Pertussis more commonly known?

Output answer:
whooping cough