Complex sentence: John Osborne's play "Look Back In Anger" (1956) showed Angry Young Men not totally dissimilar to the film and theatre directors of the movement; the hero is a graduate, but working in a manual occupation.
Split into simpler sentences: John Osborne's play "Look Back In Anger" (1956) depicted young men in a way that is similar to the then-contemporary "Angry Young Men" movement of film and theatre directors. The hero of "Look Back In Anger" is a graduate, but he is working in a manual occupation.