Two men in black shirts each standing on one arm.
Two men standing on their feet.
Standing on an arm means they're not on their feet.
exists x1.(all x2.(n_standing(x2) -> exists s1 x3 x4.(a_topic(x1) & on(x1,x4) & n_arm(x4) & card_eq_1(x4) & in(x1,x3) & for(x3,x2) & n_shirt(x3) & a_black(s1) & Theme(s1,x3))) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_foot(x3) & of(x3,x1) & n_thing(x1) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_man(x1) & card_eq_2(x1))