A snowboarder goes down a short hill next to stairs.
dog chases bird
A snowboarder going down is not the same as a dog who chases a bird
exists e1 s1 x1 x2 x3.(to(e1,x3) & n_stair(x3) & r_next(e1) & down(e1,x2) & n_hill(x2) & a_short(s1) & Theme(s1,x2) & Actor(e1,x1) & v_go(e1) & n_snowboarder(x1))
exists x1 x2 x3.(n_bird(x1) & of(x1,x3) & n_chase(x3) & of(x1,x2) & n_dog(x2) & a_topic(x1))