Two men standing beside bikes wearing different hats.
Two men are discussing the differences between their bikes.
two men standing besides bikes wearing different hats does not imply they are discussing differences between their bikes.
exists e2 e1 x1 x2 x3 x4 x5 x6.(n_hat(x6) & a_topic(x1) & beside(e1,x3) & Theme(e2,x5) & Actor(e2,x4) & v_wear(e2) & -(x5 = x6) & n_hat(x5) & (x3 = x4) & n_bike(x3) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(n_bike(x3) & of(x3,x2) & n_thing(x2) & n_difference(x2) & Theme(e1,x2) & Actor(e1,x1) & v_discuss(e1) & between(x2,x3) & n_man(x1) & card_eq_2(x1))