A man in short shorts is posing on a large rock.
A man is sitting on a rock to take a funny picture to amuse his girlfriend.
A man posing on rock is not necessarily to take a funny picture and not necessarily to amuse his girlfriend.
exists e1 s1 s2 x1 x2 x3.(on(e1,x3) & n_rock(x3) & a_large(s2) & Theme(s2,x3) & Actor(e1,x1) & v_pose(e1) & in(x1,x2) & n_shorts(x2) & a_short(s1) & Theme(s1,x2) & n_man(x1))
exists e1 p1 x1 x2 x3 x5.(Topic(e1,p1) & exists e2 p2 s1 x4.(Topic(e2,p2) & exists e3.(Theme(e3,x5) & Actor(e3,x1) & v_amuse(e3)) & Theme(e2,x4) & Actor(e2,x1) & v_take(e2) & n_picture(x4) & a_funny(s1) & Theme(s1,x4)) & n_girlfriend(x5) & of(x5,x1) & n_male(x1) & on(e1,x3) & n_rock(x3) & Actor(e1,x2) & v_sit(e1) & n_man(x2) & n_man(x1))