A light-colored dog runs through the grass.
A dog is playing with a bone in front of the couch.
The dog can not run through the grass and be playing with a bone in front of a couch at the same time.
exists e1 s1 x1 x2.(n_grass(x2) & through(e1,x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1) & a_light-colored(s1) & Theme(s1,x1))
exists e1 x1 x2 x3 x4.(n_couch(x4) & with(e1,x2) & in(x2,x3) & of(x3,x4) & n_front(x3) & n_bone(x2) & Actor(e1,x1) & v_play(e1) & n_dog(x1))