Input question: In which sport did Eric Navet of France become a 1990 world champion?

Output answer: show jumping

Input question: What was the operational name of the Battle of Iwo Jima?

Output answer: operation detachment

Input question: What is the name of the rose coloured gaseous envelope outside the incandescent surface of the sun?

Output answer: chromosphere

Input question: What colour ribbon was 'tied around the Ole Oak Tree' in a 1973 hit single by Tony Orlando and Dawn?

Output answer:
yellow