A dog playing fetch in a green field.
A dog is playing with a cat.
Playing fetch is with a human, and can not take place with a cat.
exists e1 s1 x1 x2 x3.(in(e1,x3) & n_field(x3) & a_green(s1) & Theme(s1,x3) & Actor(e1,x1) & v_fetch(e1) & n_playing(x1) & of(x1,x2) & n_dog(x2))
exists e1 x1 x2.(with(e1,x2) & n_cat(x2) & Actor(e1,x1) & v_play(e1) & n_dog(x1))