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]: varicose veins are a condition in which the veins in the leg area have become enlarged.
[EX A]: varicose veins

[EX Q]: the archbishop of canterbury is the spiritual leader of the church of england and in the anglican communion the leader of its mother church.
[EX A]: archbishop of canterbury

[EX Q]: las anod is a city in northern somalia.
[EX A]:
las anod