Policemen ride motorcycles through a crowd.
Policewomen ride bikes along the beach.
There can either be policemen or policewomen.
exists s1 x1 x2 x3.(a_topic(x1) & through(x1,x3) & n_crowd(x3) & n_motorcycle(x1) & of(x1,x2) & n_ride(x2) & a_policemen(s1) & Theme(s1,x1))
exists x1 x2 x3 x4.(n_beach(x4) & a_topic(x1) & along(x1,x4) & n_bike(x1) & of(x1,x3) & n_ride(x3) & (x1 = x2) & ne_nam_policewomen(x2))