In the United States, NORAD is divided into three sectors.
( ( In ( the ( United States ) ) ) ( , ( NORAD ( ( is ( divided ( into ( three sectors ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT the) (NNP United) (NNPS States))) (, ,) (NP (NNP NORAD)) (VP (VBZ is) (VP (VBN divided) (PP (IN into) (NP (CD three) (NNS sectors))))) (. .)))
The three NORAD sectors in the US were created at its inception.
( ( ( The ( three ( NORAD sectors ) ) ) ( in ( the US ) ) ) ( ( were ( created ( at ( its inception ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (CD three) (JJ NORAD) (NNS sectors)) (PP (IN in) (NP (DT the) (NNP US)))) (VP (VBD were) (VP (VBN created) (PP (IN at) (NP (PRP$ its) (NN inception))))) (. .)))