original: plessur is an administrative district in the canton of graubünden , switzerland .
simplifications: plessur is an administrative district in the canton of graubunden switzerland . plessur is an administrative district in the canton of graubünden , switzerland . plessur is an administrative district in the canton of graubünden , switzerland . plessur is an administrative district in the graubünden canton of switzerland . plessur is a government district in the canton of graubünden , switzerland . plessur is an administrative district in the canton of graubünden , switzerland . plessur is an administrative district in the canton of graubünden , switzerland . plessur is an administrative district in the canton of graubünden , switzerland .