Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.

Input: Consider Input: lee soo-young (born lee ji-yeon april 12, 1979) is a korean ballad singer.

Output: lee soo-young


Input: Consider Input: pakistan super league (psl) is a professional twenty20 cricket tournament in pakistan.

Output: pakistan super league


Input: Consider Input: lambton county is a county in southwestern ontario, canada.


Output: lambton county