A roller derby girl circles the rink.
The roller derby girl practiced techniques in the rink.
A girl doing circles in the rink does not indicate that she practiced technique.
exists e1 x1 x2 x3 x4.(n_rink(x4) & Theme(e1,x4) & Actor(e1,x1) & v_circle(e1) & n_girl(x1) & of(x1,x3) & n_derby(x3) & of(x1,x2) & n_roller(x2))
exists e1 s1 x1 x2 x3 x4.(n_rink(x4) & n_girl(x1) & a_derby(s1) & Theme(s1,x1) & of(x1,x2) & n_roller(x2) & in(e1,x4) & Theme(e1,x3) & Actor(e1,x1) & v_practice(e1) & n_technique(x3))