The girls are playing with foam swords.
Girls are playing with swords in a park.
Not every sword is foam, not everyone plays in a park.
exists e1 x1 x2 x3.(n_girl(x1) & with(e1,x2) & n_sword(x2) & of(x2,x3) & n_foam(x3) & Actor(e1,x1) & v_play(e1))
exists e1 x1 x2 x3.(in(e1,x3) & n_park(x3) & with(e1,x2) & n_sword(x2) & Actor(e1,x1) & v_play(e1) & n_girl(x1))