Two young males siting outdoors in front of riot police.
the police stayed indoors
Two young males sitting outdoors in front of riot police.  Police was indoors and outdoors. Two young males stayed outdoors.
exists e1 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(e1,x4) & of(x4,x5) & n_police(x5) & of(x5,x6) & n_riot(x6) & n_front(x4) & Theme(e1,x3) & Actor(e1,x2) & v_site(e1) & n_outdoors(x3) & (x1 = x2) & n_male(x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1 x2.(n_police(x1) & Theme(e1,x2) & Actor(e1,x1) & v_stay(e1) & n_indoor(x2))