The skier is descending the hill whilst wearing a silver helmet and red backpack.
The skier is descending the hill
Descending the hill whilst wearing a silver helmet is a type of descending.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6 x7 x8.(n_whilst(x2) & of(x2,x3) & n_hill(x3) & n_skier(x1) & Theme(e2,x2) & Actor(e2,x1) & v_descend(e2) & Theme(e1,x5) & Actor(e1,x4) & v_wear(e1) & n_backpack(x8) & a_red(s1) & Theme(s1,x8) & n_helmet(x7) & subset_of(x8,x5) & subset_of(x7,x5) & of(x5,x6) & n_silver(x6) & (x2 = x4))
exists e1 x1 x2.(n_hill(x2) & n_skier(x1) & Theme(e1,x2) & Actor(e1,x1) & v_descend(e1))