Given the task definition and input, reply with output. From the given sentence, extract the phrase (often noun or verb) that carries the given relationship. The generated phrase should be present in the sentence.

Given Relationship: 'be imprison by', Sentence: 'There is also the case where Saruman imprisons Gandalf , but inexplicably does not attempt to take the Ring of Fire from Gandalf , even tho Saruman coveted the Ring and begrudged the fact that Cirdan had given it to Gandalf .'

imprisons