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]: goldhanger is a village and civil parish in maldon district, essex, england.
[EX A]: goldhanger

[EX Q]: chiayi city (; taiwanese: ka-gī chhī) is a provincial city of southwestern taiwan province of the republic of china.
[EX A]: chiayi city

[EX Q]: a rearguard is a part of a military force that protects the main force from attack from the rear.
[EX A]:
rearguard