Kelvedon Hatch Secret Nuclear Bunker
The Kelvedon Hatch Secret Nuclear Bunker at Kelvedon Hatch , in the Borough of Brentwood in the English county of Essex , is a large underground bunker maintained during the Cold War as a potential regional government headquarters . 
<triplet> Kelvedon Hatch Secret Nuclear Bunker <subj> Kelvedon Hatch <obj> located in the administrative territorial entity