two police ride on the same bike.
There were two police officers per bike at the beach
There is nothing to indicate that the police officers at at the beach.
exists s1 x1 x2 x3.(n_bike(x3) & a_same(s1) & Theme(s1,x3) & a_topic(x1) & on(x1,x3) & n_ride(x1) & of(x1,x2) & n_police(x2) & card_eq_2(x1))
exists p1 x1 x5.(n_beach(x5) & exists x2 x3 x4.((x1 = x2) & per(x2,x4) & at(x4,x5) & n_bike(x4) & n_officer(x2) & of(x2,x3) & n_police(x3) & card_eq_2(x2)))