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.
--------
Question: The runway length at Ashgabat International Airport is 2989.0 meters.

Answer: Ashgabat International Airport


Question: The floor area of 300 North LaSalle is 120770.0 square metres.

Answer: 300 North LaSalle


Question: Episode No. 4 in season was titled "the engagement ring.

Answer:
4