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: Do particles collide more in two reactants when they are both in fluid forms or solid forms? Answer: fluid

A: Do particles collide more in two reactants fluid they are both in fluid forms or solid forms.
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Q: Question: What is the most common type of cancer developed in children? Answer: leukemia

A: Leukemia is the most common type of cancer developed in children.
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Q: Question: What do many scientists think are the oldest eukaryotes? Answer: protists

A:
Many scientists think protists are the oldest eukaryotes.
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