Two people are hiking on a trail next to a large wall.
Two hikers are looking at the Great Wall of China.
not every wall is a Great Wall
exists e1 s1 x1 x2 x3 x4.(on(e1,x2) & to(x3,x4) & n_wall(x4) & a_large(s1) & Theme(s1,x4) & next(x2,x3) & n_thing(x3) & n_trail(x2) & Actor(e1,x1) & v_hike(e1) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4.(ne_org_china(x4) & ne_org_wall(x2) & (x2 = x3) & ne_org_great(x3) & at(e1,x2) & of(x2,x4) & Actor(e1,x1) & v_look(e1) & n_hiker(x1) & card_eq_2(x1))