In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

[Q]: Red blood cells (RBCs), also called erythrocytes, are the most common type of blood cell and the vertebrate's principal means of delivering oxygen (O) to the body tissues -- via blood flow through the circulatory system. RBCs take up oxygen in the lungs, or gills of fish, and release it into tissues while squeezing through the body's capillaries.
[A]: where do you find red blood cells in the body

[Q]: The Chancellor is the third-oldest major state office in English and British history; it originally carried responsibility for the Exchequer, the medieval English institution for the collection and auditing of royal revenues which dates from the Anglo-Saxon period and survived the Norman conquest of England. The earliest surviving records which are the results of the exchequer's audit, date from 1129 -- 30 under King Henry I and show continuity from previous years. The Chancellor controlled monetary policy as well as fiscal policy until 1997, when the Bank of England was granted independent control of its interest rates. The Chancellor also has oversight of public spending across Government departments.
[A]: when (which century) was the position of chancellor of exchequer established

[Q]: In economics, an inferior good is a good whose demand decreases when consumer income rises (or demand rises when consumer income decreases), unlike normal goods, for which the opposite is observed. Normal goods are those for which demand rises as consumer income rises. This would be the opposite of a superior good, one that is often associated with wealth and the wealthy, whereas an inferior good is associated with lower socio-economic groups.
[A]:
when is a good considered an inferior good