A boy is posing for a photograph on the beach.
A boy is smiling while taking a picture.
Not everyone is smiling when they are getting their picture taken.
exists e1 x1 x2 x3.(n_beach(x3) & for(e1,x2) & on(x2,x3) & n_photograph(x2) & Actor(e1,x1) & v_pose(e1) & n_boy(x1))
exists e1 e2 x1 x2.(while(e1,e2) & Theme(e2,x2) & Actor(e2,x1) & v_take(e2) & n_picture(x2) & Actor(e1,x1) & v_smile(e1) & n_boy(x1))