A dog with a frisbee in its mouth.
The dog may be grabbing somebody else's frisbee.
Dog can not be grabbing anything they don't have hands.
exists x1 x2 x3.(a_topic(x1) & with(x1,x2) & in(x2,x3) & n_mouth(x3) & of(x3,x1) & n_thing(x1) & n_frisbee(x2) & n_dog(x1))
exists e1 p1 x1.(n_dog(x1) & exists e2 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x1) & v_grab(e2) & n_frisbee(x4) & of(x4,x2) & Time(x2,x3) & n_else(x3) & n_person(x2)) & Topic(e1,p1) & Actor(e1,x1) & v_may(e1))