A bearded man on a train
The train conductor has a beard.
The man is not necessarily a train conductor.
exists s1 x1 x2.(a_topic(x1) & on(x1,x2) & n_train(x2) & n_man(x1) & a_bearded(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(n_conductor(x1) & of(x1,x2) & n_train(x2) & Theme(e1,x3) & Actor(e1,x1) & v_have(e1) & n_beard(x3))