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: The mixed doubles team of Xie Zhongbo and Zhang Yawen played at Hong Kong Super Series.

SOLUTION: Hong Kong Super Series

PROBLEM: The nominal GDP for Uzbekistan is $52.0 billion.

SOLUTION: Uzbekistan

PROBLEM: Browns Cambridge has a high rate charging between 20-25 pounds.

SOLUTION:
Browns Cambridge