Skateboarding grinding in a bootleg skate park.
A skateboarder is in a park.
being in a bootleg skate park is the same as being in a park
exists e1 x1 x2 x3 x4.(in(e1,x2) & n_park(x2) & of(x2,x4) & n_skate(x4) & of(x2,x3) & n_bootleg(x3) & Actor(e1,x1) & v_grind(e1) & n_skateboard(x1))
exists p1 x1.(exists x2.(in(x1,x2) & n_park(x2)) & n_skateboarder(x1))