A dog with its mouth open is about to catch a ball in a living room.
A dog is chewing on a bone.
A dog would not have it's mouth open if it was actively chewing a bone.
exists p1 s1 x1 x2 x3.(Topic(s1,p1) & Actor(s1,x1) & a_about(s1) & exists e1 x4 x5 x6.(in(e1,x5) & n_room(x5) & of(x5,x6) & n_living(x6) & Theme(e1,x4) & Actor(e1,x1) & v_catch(e1) & n_ball(x4)) & with(x1,x2) & n_open(x2) & of(x2,x3) & n_mouth(x3) & of(x2,x1) & n_thing(x1) & n_dog(x1))
exists e1 x1 x2.(on(e1,x2) & n_bone(x2) & Actor(e1,x1) & v_chew(e1) & n_dog(x1))