Einstein's Puzzle

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There are 5 houses next to each other . In each house lives a man with a different nationality . Every man has a favorite drink , a pet of a particular kind and a favorite brand of cigarettes
-The Englishman lives in the red house.
-The Swede keeps dogs.
-The Dane drinks tea.
-The green house is just to the left of the white one.
-The owner of the green house drinks coffee.
-The Pall Mall smoker keeps birds.
-The owner of the yellow house smokes Dunhills.
-The man in the center house drinks milk.
-The Norwegian lives in the first house.
-The Blend smoker has a neighbor who keeps cats.
-The man who smokes Blue Masters drinks bier.
-The man who keeps horses lives next to the Dunhill smoker.
-The German smokes Prince.
-The Norwegian lives next to the blue house.
-The Blend smoker has a neighbor who drinks water.
The question to be answered is: Who keeps fish?