A man teaches a classroom of children.
He is a science teacher.
A science teacher is not the only kind of man who can teach a classroom of children.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_teach(e1) & of(x2,x3) & n_child(x3) & n_classroom(x2) & n_man(x1))
exists p1 x1.(n_male(x1) & exists x2 x3.((x1 = x2) & n_teacher(x2) & of(x2,x3) & n_science(x3)))