1 The room is a yellow house, where Norwegians live, smoke Dunhill cigarettes, drink water and keep cats. The second house is a blue house, living in Denmark, smoking mixed cigarettes, drinking tea and raising horses; The third room is a red house, where English people live, smoke Pall Mall cigarettes, drink milk and raise birds. The fourth house is a green house, living in Germany, smoking prince cigarettes and drinking coffee; The fifth house is a white house, living in Sweden, smoking blue, drinking beer and raising dogs.

Conclusion: If one of them raises fish, it must be German!