Two men are walking with an elephant.
Two men are in an enclosure walking with an elephant.
Walking with an elephant doesn't imply walking with an elephant in an enclosure.
exists e1 x1 x2.(with(e1,x2) & n_elephant(x2) & Actor(e1,x1) & v_walk(e1) & n_man(x1) & card_eq_2(x1))
exists p1 x1.(exists x2 x3 x4.(in(x1,x2) & with(x2,x4) & n_elephant(x4) & n_walking(x2) & of(x2,x3) & n_enclosure(x3)) & n_man(x1) & card_eq_2(x1))