( ( ( Build '' ) ( a ( breakwater ( to ( protect ( the coast ) ) ) ) ) ) . )
(ROOT (S (VP (VBG Build) ('' '') (NP (DT a) (NN breakwater) (S (VP (TO to) (VP (VB protect) (NP (DT the) (NN coast))))))) (. .)))
Build&quot; a breakwater to protect the coast.
(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)))) (. .)))