A crowd of people standing on the sidewalk behind a barricade.
There are people sleeping.
You cannot be sleeping and standing at the same time.
exists e1 x1 x2 x3 x4 x5.(n_sidewalk(x4) & a_topic(x1) & of(x1,x2) & behind(e1,x5) & n_barricade(x5) & on(e1,x4) & Actor(e1,x3) & v_stand(e1) & (x2 = x3) & n_people(x2) & n_crowd(x1))
exists p1 x1 e1 x2 x3.((x1 = x2) & Actor(e1,x3) & v_sleep(e1) & (x2 = x3) & n_people(x2))