A man is skating on a vert ramp
There is a man on the vert ramp.
Vert ramp is used for skating.
exists e1 x1 x2 x3.(on(e1,x2) & n_ramp(x2) & of(x2,x3) & n_vert(x3) & Actor(e1,x1) & v_skate(e1) & n_man(x1))
exists p1 x1 x3 x4.(n_ramp(x3) & of(x3,x4) & n_vert(x4) & exists x2.((x1 = x2) & on(x2,x3) & n_man(x2)))