Sentence:  <WSD>Ismene</WSD> and the Guard are the opposite of Antigone and Creon, yet for a full understanding of the human condition they are equally important. 
Meaning of the word marked with <WSD> tags:  A daughter and half-sister of Oedipus, daughter and granddaughter of Jocasta, and sister of Antigone, Eteocles and Polynices.