One brown and one black dog in grass.
The dogs are playing with each other.
Two dogs can exist on grass without playing with each other, there are many other things that they could be doing, or they could be doing nothing whatsoever.
exists s1 s2 x1 x2 x3.(a_topic(s1) & subset_of(x2,s1) & in(x2,x3) & n_grass(x3) & n_dog(x2) & a_black(s2) & Theme(s2,x2) & card_eq_1(x2) & subset_of(x1,s1) & n_brown(x1) & card_eq_1(x1))
exists e1 x1.(n_dog(x1) & all x2.(n_other(x2) -> with(e1,x2)) & Actor(e1,x1) & v_play(e1))