A man is smiling while standing behind a podium.
podiums are small
Just because you stand behind a podium does not mean it has to be small.
exists e2 e1 x1 x2.(while(e1,e2) & behind(e2,x2) & n_podium(x2) & Actor(e2,x1) & v_stand(e2) & Actor(e1,x1) & v_smile(e1) & n_man(x1))
exists s1 x1.(Theme(s1,x1) & a_small(s1) & n_podium(x1))