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 runway name of Afonso Pena International Airport is 15/33.
Afonso Pena International Airport

April 23	Los Angeles	El Salvador	Drawn Xiao Zhanbo
April 23

The International Covenant on Economic, Social and Cultural Rights was signed in 1977.

International Covenant on Economic, Social and Cultural Rights