Skateboarder with black and white hat performing an ollie in a skate park.
Person on a skateboard
The skateboarder would be a person. If they are performing an ollie, they would be on the skateboard.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6.(a_topic(x1) & with(x1,x2) & in(e1,x5) & n_park(x5) & of(x5,x6) & n_skate(x6) & Theme(e1,x4) & Actor(e1,x3) & v_perform(e1) & n_ollie(x4) & (x2 = x3) & n_hat(x2) & a_white(s2) & Theme(s2,x2) & a_black(s1) & Theme(s1,x2) & n_skateboarder(x1))
exists s1 x1.(ne_nam_person(s1) & a_topic(s1) & on(s1,x1) & n_skateboard(x1))