Teens are posing for a picture at a crowded event.
the teens are fifteen
We don't know if they are fifteen.
exists e1 s1 x1 x2 x3.(at(e1,x3) & n_event(x3) & a_crowded(s1) & Theme(s1,x3) & for(e1,x2) & n_picture(x2) & Actor(e1,x1) & v_pose(e1) & n_teens(x1))
exists e1 x1.(n_teens(x1) & Theme(e1,x1) & v_fifteen(e1))