Girls participate in roller derby.
The are running across the atlantic
They are either  participating in a roller derby or running across the atlantic
exists e1 x1 x2 x3.(in(e1,x2) & n_derby(x2) & of(x2,x3) & n_roller(x3) & Actor(e1,x1) & v_participate(e1) & n_girl(x1))
(x)