Two dogs, both wearing collars, are playing with one another in the grass.
Cats are fighting over the bed.
Sentence one claims there are two dog, in the grass, while sentence two states there are two cats near a bed. A bed is usually not found in the grass.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6.(n_grass(x6) & in(e2,x6) & with(e2,x5) & n_thing(x5) & card_eq_1(x5) & a_another(s1) & Theme(s1,x5) & Actor(e2,x1) & v_play(e2) & rel(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_wear(e1) & n_collar(x4) & (x2 = x3) & n_thing(x2) & n_dog(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_bed(x2) & over(e1,x2) & Actor(e1,x1) & v_fight(e1) & n_cat(x1))