A skier skiing down a large mountain
A person competing in a ski competition.
Just because someone is skiing it doesn't mean he's in a ski competition
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 s1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_competition(x3) & a_ski(s1) & Theme(s1,x3) & Actor(e1,x2) & v_compete(e1) & (x1 = x2) & n_person(x1))