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]: laurie cunningham is a former football player.
[EX A]: laurie cunningham

[EX Q]: the first record of cheddar cheese dates back to the 12th century.
[EX A]:
cheddar cheese