What is a zamboni?
A zamboni is a machine that resurfaces ice rinks used for skating.  They are used in recreational skating, professional skating, team skating, and even on olympic skating rinks.  After the ice is resurfaced skating becomes easier and more safe because there is less risk for a trip hazard on the ice.
Instruction: What is a zamboni?
Context: 
Response: A zamboni is a machine that resurfaces ice rinks used for skating.  They are used in recreational skating, professional skating, team skating, and even on olympic skating rinks.  After the ice is resurfaced skating becomes easier and more safe because there is less risk for a trip hazard on the ice.