You will be given a definition of a task first, then some input of the task.
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.

northwest airlines flight 255, a mcdonnell douglas md-82, crashed in romulus, michigan shortly after takeoff from detroit metropolitan wayne county airport on august 16, 1987, at about 8:46 p.m. edt (00:46 utc august 17).
Output:
northwest airlines flight 255