Two people are hiking on a trail next to a large wall.
Two people drive next to a large wall.
People cannot drive and be hiking on trail at same time.
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 s1 x1 x2.(to(e1,x2) & n_wall(x2) & a_large(s1) & Theme(s1,x2) & r_next(e1) & Actor(e1,x1) & v_drive(e1) & n_people(x1) & card_eq_2(x1))