A kid doing a ollie in a skate park.
A kid plays on a concrete surface.
Not all skate parks are on a concrete surface
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & in(x3,x4) & n_park(x4) & of(x4,x5) & n_skate(x5) & n_ollie(x3) & (x1 = x2) & n_kid(x1))
exists e1 s1 x1 x2.(on(e1,x2) & n_surface(x2) & a_concrete(s1) & Theme(s1,x2) & Actor(e1,x1) & v_play(e1) & n_kid(x1))