Determine if the sentence is true based on the text below:
These two teams will remain the only rivalry in Zurich.

The Zurich derby is a football match between rivals FC Zurich and Grasshopper Club Zurich. The two teams were founded in Zurich, Switzerland. Grasshopper in 1886 and Zurich in 1896. Grasshoppers are known as the club of the elite and FCZ are known as the club of the workers. The derby is unique in Switzerland as it is the only rivalry between two teams from the same city.
It's impossible to say