A man teaches a classroom of children.
A woman teaches a classroom.
A man is not a woman.
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 e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_teach(e1) & n_classroom(x2) & n_woman(x1))