TASK DEFINITION: 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.
PROBLEM: the 7 july 2005 london bombings (also called 7/7) were suicide bomb attacks aimed at london's public transport system during the morning rush hour.

SOLUTION: 7 july 2005 london bombings

PROBLEM: nexon corporation is a korean gaming corporation and developer of online games and mmorpgs.

SOLUTION: nexon

PROBLEM: payari is a village in bangladesh.

SOLUTION:
payari