Three men work behind a short wall.
three laboured men working by short wall
Three men work behind a short wall implies presence of three laboured men working by short wall.
exists e1 s1 x1 x2.(behind(e1,x2) & n_wall(x2) & a_short(s1) & Theme(s1,x2) & Actor(e1,x1) & v_work(e1) & n_man(x1) & card_eq_3(x1))
exists e1 s1 s2 x1 x2 x3.(a_topic(x1) & by(e1,x3) & n_wall(x3) & a_short(s2) & Theme(s2,x3) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_man(x1) & a_laboured(s1) & Theme(s1,x1) & card_eq_3(x1))