A team of girls competing on rollerskates.
A roller derby team competing with each other.
there is not any indication that those are roller derby team
exists e1 x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & on(e1,x4) & n_rollerskate(x4) & Actor(e1,x3) & v_compete(e1) & (x2 = x3) & n_girl(x2) & n_team(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & all x5.(n_other(x5) -> with(e1,x5)) & Actor(e1,x4) & v_compete(e1) & (x1 = x4) & n_team(x1) & of(x1,x3) & n_derby(x3) & of(x1,x2) & n_roller(x2))