Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.

[EX Q]: area code 701 is an area code for the u.s. state of north dakota.
[EX A]: area code 701

[EX Q]: pipo de clown (english: pipo the clown) is a clown who became very popular on dutch television.
[EX A]: pipo de clown

[EX Q]: satin is a type of cloth that has a glossy surface and a dull back.
[EX A]:
satin