This is the 2265th most frequent German word.
gelsenkirchen
"Gelsenkirchen" is a city in western Germany.
In this case, 'Gelsenkirchen' refers to the city itself and is part of a general statement about its recognition.
Gelsenkirchen ist für seinen Fußballverein bekannt.
Gelsenkirchen is known for its football club.
Here, 'Gelsenkirchen' specifies the location of the workplace relative to someone mentioned in the sentence.
Mein Cousin arbeitet in einem Büro in Gelsenkirchen.
My cousin works in an office in Gelsenkirchen.
Here, 'Gelsenkirchen' functions as the proper name of a city, used as a destination in a sentence.