Professional skier on snowy mountain.
a skiers is ona  mountain
on snowy mountain almost the same as ona mountain
exists s1 s2 x1 x2.(a_topic(x1) & on(x1,x2) & n_mountain(x2) & a_snowy(s2) & Theme(s2,x2) & n_skier(x1) & a_professional(s1) & Theme(s1,x1))
exists p1 x1.(exists s1 x2.((x1 = x2) & n_mountain(x2) & a_ona(s1) & Theme(s1,x2)) & n_skier(x1))