premise: a small brown and white dog swimming through the pool next to a man. hypothesis: A man and a small multicolored dog are in the water.
entailment: The man is swimming with his brown and white dog in a pool.|entailment: brown and white would make the dog multicolored  and since the dog is swimming next to the man both would have to be in the water.|entailment: The dog in the pool is near the man so they are both in the water.