A guy wearing a white shirt is taking a picture.
The guy is taking a picture of a cloud.
The fact that the guy is taking a picture does not necessarily imply it is of a cloud.
exists e1 e2 s1 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x1) & v_take(e2) & n_picture(x4) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_shirt(x3) & a_white(s1) & Theme(s1,x3) & (x1 = x2) & n_guy(x1))
exists e1 x1 x2 x3.(n_guy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & of(x2,x3) & n_cloud(x3) & n_picture(x2))