This task is about identifying the subject of a given sentence. The subject of a sentence is the person, place, or thing that is performing the action of the sentence. The subject represents what or whom the sentence is about. Each sentence in this task is guaranteed to contain a single subject. The input is a sentence and the output is the identified subject of that sentence.

The operating organization for Appleton International Airport is in Outagamie County, Wisconsin.
Appleton International Airport

Spain uses the euro for its currency.
Spain

The Dong'an District in Mudanjiang has population of 180,000.

Dong'an District