a roller-blader grinds a rail at an indoor skate park.
The rollerblader is rolling around.
A rollerblader rolling around can be done in an indoor skate park.
exists e1 s1 x1 x2 x3 x4.(at(e1,x3) & n_park(x3) & of(x3,x4) & n_skate(x4) & a_indoor(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_grind(e1) & n_rail(x2) & n_roller-blader(x1))
exists e1 p1 x1.(n_rollerblader(x1) & exists s1.(Theme(s1,x1) & a_around(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_roll(e1))