Condition of the riddle:
There are 5 houses in a row. In each house lives a person of different nationality. Each of them drinks a different beverage, smokes different cigarettes, and keeps a different animal. No one repeats in any category.
Known facts:
1. The Englishman lives in the red house.
2. The Swede has a dog.
3. The Dane drinks tea.
4. The green house is immediately to the left of the white house.
5. In the green house they drink coffee.
6. The person who smokes Pall Mall keeps fish.
7. In the yellow house they smoke Dunhill.
8. In the middle house they drink milk.
9. The Norwegian lives in the first house.
10. The one who smokes Blends lives next to the one who keeps a cat.
11. The person who has fish lives next to the one who smokes Dunhill.
12. The one who smokes BlueMaster drinks beer.
13. The German smokes Prince.
14. The neighbor of the Norwegian lives in the blue house.
15. The neighbor of the person who smokes Blends drinks water.
Question:
Who keeps fish?
