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))))) (. .)))
There are four NORAD sectors in the United States.
( There ( ( are ( ( four ( NORAD sectors ) ) ( in ( the ( United States ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD four) (JJ NORAD) (NNS sectors)) (PP (IN in) (NP (DT the) (NNP United) (NNPS States))))) (. .)))