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]: vitoria-gasteiz is the basque country capital.
[EX A]: vitoria-gasteiz

[EX Q]: the river clyde (, ]) is a river in scotland.
[EX A]: river clyde

[EX Q]: gossliwil is a former municipality in the district bucheggberg, in the canton of solothurn, switzerland.
[EX A]:
gossliwil