In this task you're given a question and you have to paraphrase the question to create the output question while retaining the meaning of the original question.
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Question: What is the Difference between a Wet type and a Dry type Cylinder Liner?

Answer: What are the different types of mechanical seal?

Question: Why do I have black lines in one of my nails? I need cure from this ..What to do..??

Answer: I have a straight black line that runs across my nails. How do I get rid of it (picture below)?

Question: How will YouTube's popularity change over the next five years?

Answer:
Will YouTube replace TV in 5-10 years in the US?