Three Castles
The Three Castles was a former medieval lordship , comprising the fortifications of Grosmont , Skenfrith and White Castle in Monmouthshire , Wales . 
<triplet> White Castle <subj> Monmouthshire <obj> located in the administrative territorial entity <triplet> Monmouthshire <subj> Wales <obj> located in the administrative territorial entity <triplet> Wales <subj> Monmouthshire <obj> contains administrative territorial entity