A couple is hugging and one of them is holding a sign that says free hugs.
Nobody is holding a sign.
They are either holding a sign or not.
exists e1 e2 e3 s1 x1 x2 x3 x4 x5.(Theme(e3,x3) & Actor(e3,x2) & v_hold(e3) & Theme(e2,x5) & Actor(e2,x4) & v_say(e2) & n_hug(x5) & a_free(s1) & Theme(s1,x5) & (x3 = x4) & n_sign(x3) & of(x2,x1) & n_thing(x1) & n_thing(x2) & card_eq_1(x2) & Actor(e1,x1) & v_hug(e1) & n_couple(x1))
-exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_sign(x2) & n_person(x1))