Boys play ball in the dirt.
Boys play in a sandlot league.
Dirt is present in many locations so it does not prove the boys are in a sandlot league.
exists e1 x1 x2 x3.(n_dirt(x3) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_ball(x2) & n_boy(x1))
exists e1 x1 x2 x3.(in(e1,x2) & n_league(x2) & of(x2,x3) & n_sandlot(x3) & Actor(e1,x1) & v_play(e1) & n_boy(x1))