A skateboarder grinding a lip.
A person has a skateboard.
Skateboarder is a person, and grinding a lip implies has a skateboard.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_grind(e1) & n_lip(x3) & (x1 = x2) & n_skateboarder(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_skateboard(x2) & n_person(x1))