A man skis on a snowy mountain.
A professional skier competing in a downhill event.
Not all skiiers are professional. Not everyone skiing on a mountain is competing.
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 s2 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_event(x3) & a_downhill(s2) & Theme(s2,x3) & Actor(e1,x2) & v_compete(e1) & (x1 = x2) & n_skier(x1) & a_professional(s1) & Theme(s1,x1))