A snowboarder is going down a snowy hill next to a staircase behind a building.
a snowboarder does tricks near the stairs
Going down a hill next to the staircase doesn't imply he does tricks.
exists e1 s1 s2 x1 x2 x3 x4 x5.(a_down(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_go(e1) & to(x3,x4) & behind(x4,x5) & n_building(x5) & n_staircase(x4) & next(x2,x3) & n_thing(x3) & n_hill(x2) & a_snowy(s1) & Theme(s1,x2) & n_snowboarder(x1))
exists e1 x1 x2 x3.(n_stair(x3) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & near(x2,x3) & n_trick(x2) & n_snowboarder(x1))