The two greyhound dogs wearing sweaters are playing in the grass.
the dogs are playing fetch
Just because two dogs are playing doesn't mean they are playing fetch.
exists e2 e1 s1 x1 x2 x3 x4.(n_grass(x4) & n_dog(x1) & a_greyhound(s1) & Theme(s1,x1) & card_eq_2(x1) & in(e2,x4) & Actor(e2,x1) & v_play(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_sweater(x3) & (x1 = x2))
exists e1 s1 x1.(n_dog(x1) & a_fetch(s1) & Manner(e1,s1) & Actor(e1,x1) & v_play(e1))