A guy on a skateboard griding down a handrail.
A man competing for the Tony Hawk competition.
Just because a guy is on a skateboard doesn't imply he is the Tony Hawk competition
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & on(x1,x2) & a_down(s1) & Manner(e1,s1) & Theme(e1,x4) & Actor(e1,x3) & v_gride(e1) & n_handrail(x4) & (x2 = x3) & n_skateboard(x2) & n_guy(x1))
exists e1 x1 x2 x3 x4 x5.(n_competition(x3) & (x3 = x5) & ne_org_hawk(x5) & (x3 = x4) & ne_org_tony(x4) & a_topic(x1) & for(e1,x3) & Actor(e1,x2) & v_compete(e1) & (x1 = x2) & n_man(x1))