A black dog and a brown-and-white dog play in a field.
Two dogs play ball in a field together.
The two dogs could be playing in the same field but not together.
exists s1 s2 s3 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & in(x2,x4) & n_field(x4) & n_play(x2) & of(x2,x3) & n_dog(x3) & a_brown-and-white(s3) & Theme(s3,x2) & subset_of(x1,s1) & n_dog(x1) & a_black(s2) & Theme(s2,x1))
exists e1 s1 x1 x2 x3.(a_together(s1) & Manner(e1,s1) & in(e1,x3) & n_field(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_ball(x2) & n_dog(x1) & card_eq_2(x1))