QUESTION: Trivia question: What style of dance was invented in Argentina and Uruguay?
****
ANS: tango

Mei Li:
A custom known as the kula exchange or kula ring where great risks are taken to exchange gifts is prevalent in what part of the world??
Shuai Zheng:
papua new guinea

Input question: 'We Didn't Start the Fire' was a 1989 hit for which singer?

Output answer: billy joel

question: Answer this question.

Named after a German physicist, what is the international (SI) unit of frequency, defined as one cycle per second?
answer: hertz

question: What is the answer: The tune 'Johnny Todd' was the theme to which TV programme?
answer: z cars

Q: Which acid has the chemical formula HNO3 ?
-----
A:
nitric acid