Canada Border Services Agency
The Agency oversees operations at three major sea ports and three CBSA mail centres ( CMC ) , and operates detention facilities , known as immigration holding centres ( IHC ) , in Laval , Quebec; Toronto , Ontario; and Surrey , BC . 
<triplet> Laval <subj> Quebec <obj> located in the administrative territorial entity <triplet> Quebec <subj> Laval <obj> contains administrative territorial entity <triplet> Toronto <subj> Ontario <obj> located in the administrative territorial entity