TASK 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.
PROBLEM: original question: What is the club interest of [Club Naval de Ferrol]
answer: sailing
answer type: Club interest.
auxiliary information: The Club Naval de Ferrol, officially named Centro Deportivo SocioCultural Armada since May 25, 2003 is a yacht club in Galicia. This club is located in the harbor city of Ferrol.

SOLUTION: [Club Naval de Ferrol] has what club interest?

PROBLEM: original question: Which system of nobility is the first one that has the rank of [Sultan]?
answer: sultanate of rum
answer type: System of nobility.
auxiliary information: Sultan is a noble title with several historical meanings. Originally, it was an Arabic abstract noun meaning "strength", "authority", "rulership", derived from the verbal noun sultah, meaning "authority" or "power". Later, it came to be used as the title of certain rulers who claimed almost full sovereignty in practical terms, albeit without claiming the overall caliphate, or to refer to a powerful governor of a province within the caliphate. The dynasty and lands ruled by a sultan are referred to as a sultanate. A feminine form of sultan, used by Westerners, is sultana or sultanah; however, this styling misconstrues the roles of wives of sultans. In a similar usage, the wife of a German field marshal might be styled Feldmarschallin. The rare female leaders in Muslim history are correctly known as "sultanas". However, in the Sultanate of Sulu, the wife of the sultan is styled as the "panguian". Among those modern hereditary rulers who wish to emphasize their secular authority under the rule of law, the term is gradually being replaced by king and Datu in Maranao.

SOLUTION: What is the name of the nobility system that first had the rank of [Sultan]?

PROBLEM: original question: What is the film series that contains films in [DVD] format?
answer: sesame street preschool is cool
answer type: Film series.
auxiliary information: DVD is a digital optical disc storage format, invented and developed by Philips, Sony, Toshiba, and Panasonic in 1995. DVDs can be played in multiple types of players, including DVD players. DVDs offer higher storage capacity than compact discs while having the same dimensions. Pre-recorded DVDs are mass-produced using molding machines that physically stamp data onto the DVD. Such discs are known as DVD-ROM, because data can only be read and not written or erased. Blank recordable DVD discs can be recorded once using a DVD recorder and then function as a DVD-ROM. Rewritable DVDs can be recorded and erased many times. DVDs are used in DVD-Video consumer digital video format and in DVD-Audio consumer digital audio format, as well as for authoring DVD discs written in a special AVCHD format to hold high definition material. DVDs containing other types of information may be referred to as DVD data discs.

SOLUTION:
What series is the [DVD] format part of?