A boy carries a large load down some stairs.
A boy is going down the stairs.
Since the boy carries a large load on stairs, it can be assumed he is going down the stairs.
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_carry(e1) & down(x2,x3) & n_stair(x3) & n_load(x2) & a_large(s1) & Theme(s1,x2) & n_boy(x1))
exists e1 s1 x1 x2.(n_stair(x2) & a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_go(e1) & n_boy(x1))