Question: Generate a question about the topic "Harry Potter" whose answer would be: The series also originated much tie-in merchandise, making the Harry Potter brand worth in excess of $15 billion..
Answer: how much are the harry potter movies worth?

Question: Generate a question about the topic "Area code 810" whose answer would be: Area code 810 is the telephone area code serving eastern Michigan ..
Answer: what area code is 810?

Question: Generate a question about the topic "Defragmentation" whose answer would be: In the maintenance of file systems , defragmentation is a process that reduces the amount of fragmentation ..
Answer:
What is the disk defragmenter tool?