A snow skier is going down a slalom course.
The skier is on a mountain.
There is a skier in both sentences
exists e1 s1 x1 x2 x3 x4.(a_down(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x1) & v_go(e1) & n_course(x3) & of(x3,x4) & n_slalom(x4) & n_skier(x1) & of(x1,x2) & n_snow(x2))
exists p1 x1.(n_skier(x1) & exists x2.(on(x1,x2) & n_mountain(x2)))