Complex sentence: Christian de Neuvilette, a handsome new recruit in the Gascon Guards, points out to his drunken friend, Lignière, a woman in one of the boxes with whom he is in love.
Split into simpler sentences: Christian de Neuvilette, a handsome new recruit in the Gascon Guards. He points out to his drunken friend, Ligniere, a woman in one of the boxes with who he is in love.