TASK DEFINITION: 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.
PROBLEM: Beautiful English venue,  The Phoenix,  downside.. Customer rating only 1-5.

SOLUTION: The Phoenix

PROBLEM: The active ingredient of Eribulin Mesylate (E7389) is a type of Macrolide

SOLUTION: Eribulin Mesylate (E7389)

PROBLEM: The Country (endonym) Isle of Man Ellan Vannin is also the Isle of Man (exonym).

SOLUTION:
Isle of Man