A boy is skateboarding in a skateboard park.
A boy is skateboarding
The boy skateboarding in a skateboard park is still a boy skateboarding.
exists e1 x1 x2 x3.(in(e1,x2) & n_park(x2) & of(x2,x3) & n_skateboard(x3) & Actor(e1,x1) & v_skateboard(e1) & n_boy(x1))
exists e1 x1.(Actor(e1,x1) & v_skateboard(e1) & n_boy(x1))