Input: Relationship: 'be imprison by', Argument/Subject 1: 'gandalf', Argument/Subject 2: 'saruman'

Answer: 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 .