People standing in front of mechanical equipment.
People are in front of mechanical equipment trying to repair a city that has been bombed by the Germans.
There is nothing to imply that the people standing in front of mechanical equipment are trying to repair a bombed city.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & in(e1,x3) & of(x3,x4) & n_equipment(x4) & a_mechanical(s1) & Theme(s1,x4) & n_front(x3) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_people(x1))
exists p1 x1 x7.(ne_nam_germans(x7) & exists e1 p2 s1 x2 x3 x4.(in(x1,x2) & of(x2,x3) & Topic(e1,p2) & Actor(e1,x4) & v_try(e1) & exists e3 e2 x5 x6.(Theme(e3,x5) & Actor(e3,x4) & v_repair(e3) & Actor(e2,x7) & Theme(e2,x6) & v_bomb(e2) & (x5 = x6) & n_city(x5)) & (x3 = x4) & n_equipment(x3) & a_mechanical(s1) & Theme(s1,x3) & n_front(x2)) & n_people(x1))