Two large brown dogs are playing in the grass.
Two cats are prowling through a field.
Dogs are a different animal than cats, and playing is not the same as prowling. Playing is fun behavior while prowling is hunting behavior.
exists e1 s1 s2 x1 x2.(n_grass(x2) & in(e1,x2) & Actor(e1,x1) & v_play(e1) & n_dog(x1) & a_brown(s2) & Theme(s2,x1) & a_large(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1 x2.(through(e1,x2) & n_field(x2) & Actor(e1,x1) & v_prowl(e1) & n_cat(x1) & card_eq_2(x1))