You will be given a definition of a task first, then some input of the task.
In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as `a` for Yes or `b` for No.

Question: How many other books has the author of The Queen's Fool written? Passage:The Queen's Fool by Philippa Gregory is a 2004 historical fiction novel. Set between 1548 and 1558, it is part of Philippa Gregory's Tudor series. The series includes The Boleyn Inheritance. The novel chronicles the changing fortunes of Mary I of England and her half-sister Elizabeth through the eyes of the fictional Hannah Green, a Marrano girl escaping to England from Spain where her mother was burned at the stake for being Jewish. Hannah is discovered by Robert Dudley and John Dee and subsequently begged as a fool to Edward VI. She witnesses and becomes caught up the intrigues of the young king's court, and later those of his sisters. As Mary, Elizabeth, and Robert Dudley use Hannah to gather information on their rivals and further their own aims, the novel can plausibly present each side in the complex story. The Queen's Fool follows Hannah from ages fourteen to nineteen, and her coming-of-age is interspersed among the historical narrative (see Bildungsroman). The book reached # 29 on the New York Times Best Seller list and had sold 165,000 copies within three weeks of its release.

Output:
a