A black and white dog is chasing a ping Frisbee.
The black dog is related to the white dog.
There is an action in the first sentence, i.e chasing a ping frisbee but none in the second.
exists e1 s1 s2 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & n_frisbee(x2) & of(x2,x3) & n_ping(x3) & n_dog(x1) & a_white(s2) & Theme(s2,x1) & a_black(s1) & Theme(s1,x1))
exists e1 s1 s2 x1.(n_dog(x1) & n_dog(x1) & a_white(s2) & Theme(s2,x1) & a_black(s1) & Theme(s1,x1) & to(e1,x1) & Theme(e1,x1) & v_relate(e1))