A man in camouflage is teaching a class.
The man is teaching a class on wilderness survival.
Because a man is teaching a class doesn't mean the class is about wilderness survival.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_teach(e1) & n_class(x3) & in(x1,x2) & n_camouflage(x2) & n_man(x1))
exists e1 x1 x2 x3 x4.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_teach(e1) & on(x2,x3) & n_survival(x3) & of(x3,x4) & n_wilderness(x4) & n_class(x2))