1) How much rain does the Atacama desert receive per year?
⇒ The Atacama desert receives 1mm of rain per year.
2) When was Thien Duong Cave discovered?
⇒ Thien Duong Cave was discovered in 2005.
3) Which fall is twice as tall as Niagara Fall?
⇒ Victoria Fall are twice as tall as Niagara Fall.
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