sentences:  Delenn then gave control of the Grey Council to the worker caste, who had for many years stayed in the middle, as the religious and warrior castes simmered with disagreement.After John Sheridan refused to stand for re-election as President of the Interstellar Alliance, Delenn is chosen to succeed him.When she accepted the role, Sheridan takes command of the Rangers until his death; Delenn asks Ivanova to succeed him.