A family is playing on the beach with their dog.
a family plays fetch with a dog
Not all families playing on a beach with their dog will play fetch.
exists e1 x1 x2 x3.(n_dog(x3) & of(x3,x2) & n_thing(x2) & n_beach(x2) & with(e1,x3) & on(e1,x2) & Actor(e1,x1) & v_play(e1) & n_family(x1))
exists e1 x1 x2 x3.(with(e1,x3) & n_dog(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_fetch(x2) & n_family(x1))