One black and white dog sleeps while the other two black and white dogs play with a plastic bag.
Dogs are playing with a plastic bag while their owner is preoccupied.
Just because dogs are playing with a plastic bag does necessarily mean the owner is preoccupied.
(-x)
exists e1 p1 s1 x1 x2 x3.(exists e2.(Theme(e2,x3) & v_preoccupy(e2)) & n_owner(x3) & of(x3,x1) & n_thing(x1) & while(e1,p1) & with(e1,x2) & n_bag(x2) & a_plastic(s1) & Theme(s1,x2) & Actor(e1,x1) & v_play(e1) & n_dog(x1))