premise: A bird is perched on a line of some sort attached to a pole. hypothesis: A bird is standing on a pole line.
entailment: Perched is another way of saying standing.  The bird is on a line attached to a pole.|entailment: Bird is perched is a paraphrase of bird is standing, and pole line is a line of some sort.|entailment: If the line is attached to the pole, it is a pole line.