Four dogs two brown and two white playing in the grass.
Two brown and two white dogs are chasing tennis balls in the grass.
Just because the dogs are chasing tennis balls doesn't mean they are playing.
exists s1 s2 x1 x2 x3.(n_grass(x3) & a_topic(x1) & in(x1,x3) & n_playing(x1) & a_white(s2) & Theme(s2,x1) & card_eq_2(x1) & card_eq_2(x1) & a_brown(s1) & Theme(s1,x1) & of(x1,x2) & n_dog(x2) & card_eq_4(x1))
exists e1 s1 s2 x1 x2 x3 x4.(n_grass(x4) & in(e1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & n_ball(x2) & of(x2,x3) & n_tennis(x3) & n_dog(x1) & a_white(s2) & Theme(s2,x1) & card_eq_2(x1) & card_eq_2(x1) & a_brown(s1) & Theme(s1,x1))