A skier skiing down a large mountain
A person is skiing on snow.
A person is skiing down on a large mountain with full of snow.
exists s1 x1 x2 x3.(a_topic(x1) & down(x1,x3) & n_mountain(x3) & a_large(s1) & Theme(s1,x3) & n_skiing(x1) & of(x1,x2) & n_skier(x2))
exists e1 x1 x2.(on(e1,x2) & n_snow(x2) & Actor(e1,x1) & v_ski(e1) & n_person(x1))