Problem: Who is the only World Heavyweight Boxing champion to retire undefeated?
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A: rocky marciano

Q: Barolo, Barbaresco and Moscato are wines from which European country?
A: italy

Problem: Which German aircraft company invented the 'ejector seat' in 1942?
Answer: heinkel

Q: Which country has the internet domain '.ch'?
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A: switzerland

Q: "Who wrote the 1955 novel ""The Quiet American""?"
What is the answer?

A: graham greene

Mei Li:
What would you find if you travelled to the centre of the solar system??
Shuai Zheng:
sun