( ( ( No protection ) ( of ( ( Breakwater Island ) ( because ( military ( security purposes ) ) ) ) ) ) ( ( no longer ) ( exist . ) ) )
(ROOT (S (NP (NP (DT No) (NN protection)) (PP (IN of) (NP (NP (NNP Breakwater) (NNP Island)) (PP (IN because) (NP (JJ military) (NN security) (NNS purposes)))))) (ADVP (RB no) (RB longer)) (VP (VBP exist)) (. .)))
No protection of Breakwater Island because military security purposes no longer exist.
(ROOT (S (NP (NP (NNS Structures)) (SBAR (WHNP (WDT that)) (S (VP (VB protect) (NP (DT the) (NN coast)) (PP (IN like) (NP (NN barrier) (NNS islands))))))) (VP (VBP are) (VP (VBN called) (NP (NNS breakwaters)))) (. .)))