Boy enjoys a day on the lake.
A boy is enjoying a baseball game in a large stadium.
Stadium and lake are different.
exists e1 x1 x2 x3.(n_lake(x3) & ne_nam_boy(x1) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1) & n_day(x2))
exists e1 s1 x1 x2 x3 x4.(Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1) & in(x2,x4) & n_stadium(x4) & a_large(s1) & Theme(s1,x4) & n_game(x2) & of(x2,x3) & n_baseball(x3) & n_boy(x1))