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.

[EX Q]: alaa murabit (born october 26, 1989) is a canadian physician and leading international activist for peace processes.
[EX A]: alaa murabit

[EX Q]: pakistan super league (psl) is a professional twenty20 cricket tournament in pakistan.
[EX A]: pakistan super league

[EX Q]: blu-ray disc is a high-density optical disc format similar to dvd.
[EX A]:
blu-ray disc