People are gathering in a street.
A security guard is doing his rounds.
A security guard is one person and cannot be people.
exists e1 x1 x2.(in(e1,x2) & n_street(x2) & Actor(e1,x1) & v_gather(e1) & n_people(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_do(e1) & n_round(x3) & of(x3,x1) & n_male(x1) & n_guard(x1) & of(x1,x2) & n_security(x2))