Military personnel patrol an area.
Soldiers are on patrol.
Soldiers duties include patrol of an area and they are military.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_patrol(e1) & n_area(x2) & n_personnel(x1) & a_military(s1) & Theme(s1,x1))
exists p1 x1.(exists x2.(on(x1,x2) & n_patrol(x2)) & n_soldier(x1))