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: tatsuya shiji (志治 達雄, shiji tatsuya, born october 20, 1938) is a former japanese football player.

SOLUTION: tatsuya shiji

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: nur muhammad taraki (1917–1979) was an afghan politician.

SOLUTION:
nur muhammad taraki