The man in the blue shirt shows of a picture.
The man is standing in front of a waterfall.
Just because a man is showing off a picture, it does not necessarily mean that he is standing in front of a waterfall, or that he is standing at all.
exists s1 x1 x2 x3 x4.(n_show(x2) & of(x2,x3) & n_shirt(x3) & a_blue(s1) & Theme(s1,x2) & n_man(x1) & a_topic(x1) & in(x1,x2) & of(x2,x4) & n_picture(x4))
exists e1 x1 x2 x3.(n_man(x1) & in(e1,x2) & of(x2,x3) & n_waterfall(x3) & n_front(x2) & Actor(e1,x1) & v_stand(e1))