three men in brown shorts are walking on rocks beside a river.
Three men are hiking.
One cannot assume that the men walking on rocks are hiking.
exists e1 s1 x1 x2 x3 x4.(beside(e1,x4) & n_river(x4) & on(e1,x3) & n_rock(x3) & Actor(e1,x1) & v_walk(e1) & in(x1,x2) & n_shorts(x2) & a_brown(s1) & Theme(s1,x2) & n_man(x1) & card_eq_3(x1))
exists e1 x1.(Actor(e1,x1) & v_hike(e1) & n_man(x1) & card_eq_3(x1))