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.

vichy is a "commune" in central france, in the auvergne-rhône-alpes region, along the allier river.
vichy

cape hatteras is a cape on the coast of north carolina.
cape hatteras

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).

northwest airlines flight 255