Definition: Compose a new way to ask the same question. The new question must be asking the exact same thing as the original question does. Without any other information, you should be able to tell that the original question and the new question are the same. Preserve bracketed phrases in your new question. You can change the rest of the question provided the above requirements are satisfied. The new question must have a natural, fluent formulation, as if it were composed by a native English speaker. You will be given three pieces of information to help you create better questions. Those are: "Answer": the answer to the question, e.g., "Honolulu". "Answer Type": the type of the answer, e.g., "Location". "Auxiliary Information" is a detailed description of some concepts mentioned in the question, if any.
Input: original question: Who is the book character whose parents has the rank of [Emperor]?
answer: eris, hercules, helen of troy...
answer type: Book Character.
auxiliary information: An emperor is a monarch, usually the sovereign ruler of an empire or another type of imperial realm. Empress, the female equivalent, may indicate an emperor's wife, mother, or a woman who rules in her own right. Emperors are generally recognized to be of a higher honour and rank than kings. The Emperor of Japan is the only currently reigning monarch whose title is translated into English as "Emperor". Both kings and emperors are monarchs, but emperor and empress are considered the higher monarchical titles. In so far as there is a strict definition of emperor, it is that an emperor has no relations implying the superiority of any other ruler, and typically rules over more than one nation. Thus a king might be obliged to pay tribute to another ruler, or be restrained in his actions in some unequal fashion, but an emperor should in theory be completely free of such restraints. However monarchs heading empires have not always used the title‚Äîthe British sovereign did not assume the title until the incorporation of India into the British Empire, and even then used it only in a limited context.

Which book character had parents who had the rank [Emperor]?