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]: david evan mcmullin (born on april 2, 1976) is a former cia operations officer and independent presidential candidate.
[EX A]: evan mcmullin

[EX Q]: salhad is one of the 51 union councils (sub-divisions) of abbottabad district in the khyber pakhtunkhwa province of pakistan.
[EX A]: salhad

[EX Q]: cardiff is the capital and biggest city of wales, in the united kingdom.
[EX A]:
cardiff