A man skis on a snowy mountain.
A person is moving down a slippery slope.
If a man skis on a snowy mountain he is also a person moving down a slippery slope.
exists e1 s1 x1 x2.(on(e1,x2) & n_mountain(x2) & a_snowy(s1) & Theme(s1,x2) & Actor(e1,x1) & v_ski(e1) & n_man(x1))
exists e1 s1 x1 x2 x3.(a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_move(e1) & n_slope(x2) & of(x2,x3) & n_slippery(x3) & n_person(x1))