A man wearing a blue shirt stands between two walls.
The man is on a roller coaster.
Roller coaster and walls are different.
exists e1 e2 s1 x1 x2 x3 x4.(between(e2,x4) & n_wall(x4) & card_eq_2(x4) & Actor(e2,x1) & v_stand(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_shirt(x3) & a_blue(s1) & Theme(s1,x3) & (x1 = x2) & n_man(x1))
exists p1 x1.(n_man(x1) & exists x2 x3.(on(x1,x2) & n_coaster(x2) & of(x2,x3) & n_roller(x3)))