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.

[Q]: regent's canal is a canal in england.
[A]: regent's canal


[Q]: zinc phosphate is a chemical compound.
[A]: zinc phosphate


[Q]: weilheim-schongau is a rural district in oberbayern in the south of bavaria, germany.
[A]:
weilheim-schongau