A picture of an African man painting.
A picture shows a man painting.
A man painting is the same in both sentences.
exists s1 x1 x2 x3.(a_topic(x1) & of(x1,x2) & n_painting(x2) & of(x2,x3) & n_man(x3) & a_african(s1) & Theme(s1,x2) & n_picture(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_show(e1) & n_painting(x2) & of(x2,x3) & n_man(x3) & n_picture(x1))