Einstein's Riddle - Hard yet interesting

EINSTEIN'S RIDDLE Difficulty level - hard

There are five houses sitting next to each other on a neighborhood street. Each house's owner is of a different nationality. Each house has different colored walls. Each house's owner drinks their own specific beverage, smokes their own brand of cigar, and keeps a certain type of pet. None of the houses share any of these variables—nationality, wall color, beverage, cigar, and pet—they are all unique.

WHAT YOU KNOW-- -1-The Englishman lives in the house with red walls.The Swede keeps dogs. -2-The Dane drinks tea. -3-The house with green walls is just to the left of the house with white walls. -4-The owner of the house with green walls drinks coffee. -5-The man who smokes Pall Mall keeps birds. -6-The owner of the house with yellow walls smokes Dunhills. -7-The man in the center house drinks milk. -8-The Norwegian lives in the first house. -9-The Blend smoker has a neighbor who keeps cats. -10-The man who smokes Blue Masters drinks beer. -11-The man who keeps horses lives next to the Dunhill smoker. -12-The German smokes Prince. -13-The Norwegian lives next to the house with blue walls. -14-The Blend smoker has a neighbor who drinks water.

THE QUESTION-- One of the house owners keeps fish, who is it?