A black-and-white dog goes for a flattened ball on the snow.
The dog is playing with it's master.
The dog could be playing alone rather than with it's master.
exists e1 e2 s1 x1 x2 x3.(n_snow(x3) & for(e1,x2) & on(x2,x3) & n_ball(x2) & Theme(e2,x2) & v_flatten(e2) & Actor(e1,x1) & v_go(e1) & n_dog(x1) & a_black-and-white(s1) & Theme(s1,x1))
exists e1 p1 x1 x2.(n_thing(x1) & n_dog(x1) & exists x3.((x1 = x3) & n_master(x3)) & with(e1,x1) & Actor(e1,x2) & v_play(e1) & (x1 = x2))