Is JK Rowling richer than Oprah?

Related questions

1. Who is richer JK Rowling or Oprah?
2. Is JK Rowling rich 2018?
3. Who is JK Rowling's publisher?
4. Where does JK Rowling live currently?
5. How much is Shakespeare's signature worth?
6. Did JK Rowling wrote the last book first?
7. Does JK Rowling have any pets?
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10. Is there a new Harry Potter movie coming out in 2020?

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17. #author
18. #potter
19. #number