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.

Example Input: alaa murabit (born october 26, 1989) is a canadian physician and leading international activist for peace processes.
Example Output: alaa murabit

Example Input: vehari district is a district in the punjab province of pakistan.
Example Output: vehari district

Example Input: a hendecagon or 11-gon is a shape with 11 sides and 11 corners.
Example Output:
hendecagon