A dog strolls, holding a Frisbee in its mouth.
There are three dogs with Frisbees'
A dog implies singular, and three dogs implies plural.
exists e1 e2 x1 x2 x3.(for(e1,e2) & in(e2,x3) & n_mouth(x3) & of(x3,x1) & n_thing(x1) & Theme(e2,x2) & Actor(e2,x1) & v_hold(e2) & n_frisbee(x2) & Actor(e1,x1) & v_stroll(e1) & n_dog(x1))
exists p1 s1 x1 x2.(a_topic(s1) & of(s1,x1) & exists x3 x4.((x2 = x3) & with(x3,x4) & n_frisbee(x4) & n_dog(x3) & card_eq_3(x3)) & (x1 = x2))