In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Q: Question: When gas particles collide, what kinds of collisions are these considered? Answer: elastic

A: When gas particles collide, these collisions are considered elastic.
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Q: Question: What kind of viscosity is found in long-chain hydrocarbons? Answer: highly viscous

A: Highly viscous kind of viscosity is found in long-chain hydrocarbons.
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Q: Question: In which way do vertebrates reproduce? Answer: sexually

A:
Vertebrates reproduce sexually.
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