Security at Parliament Hill in Ottawa has been tightened since 9\/11 , but pedestrians still can walk up to most of the buildings without passing through security gates .
Ottawa /location/location/contains Parliament Hill
NN IN NNP NNP IN NNP VBZ VBN VBN IN CD , CC NNS RB MD VB RB TO JJS IN DT NNS IN VBG IN NN NNS .
Ottawa
LOCATION
Parliament Hill
ORGANIZATION
/location/location/contains