premise: a skier doing a trick on pole while being photographed by another man. hypothesis: Man photographs skier performing a trick.
entailment: Both sentences have the premise of a man taking a picture of a skier doing a trick. Sentence one just clarifies that the trick is done on a pole.|entailment: Performing a trick is the same thing as doing a trick.|entailment: A skier trick is being photographed by a man.