Two people are on top of a cannon.
Two people are doing karate.
One cannot do karate on top of a cannon.
exists p1 x1.(exists x2 x3.(on(x1,x2) & of(x2,x3) & n_cannon(x3) & n_top(x2)) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_karate(x2) & n_people(x1) & card_eq_2(x1))