Complex sentence: When Robert arrives Juliet speaks to him and tell him that Eugene Taffler is with them, what she did not tell Robert was that Taffler had both his arms cut off in the war and was just laying on a bed in a room.
Split into simpler sentences: When Robert arrives Juliet speaks to him and tells him that Eugene Taffler is with them. What she does not tell Robert is that Taffler had both his arms cut off in the war and is just laying on a bed in a room.