The castle itself comprises an early 17th-century tower house, restored with Irish oak from the park which is held together without a single nail.
( ( The castle ) ( ( ( itself ( comprises ( an ( early ( 17th-century ( tower house ) ) ) ) ) ) , ) ( ( ( restored ( with ( Irish oak ) ) ) ( from ( ( the park ) ( which ( is ( ( held together ) ( without ( a ( single nail ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (DT The) (NN castle)) (PRN (S (NP (PRP itself)) (VP (VBZ comprises) (NP (DT an) (JJ early) (JJ 17th-century) (NN tower) (NN house)))) (, ,)) (VP (VBD restored) (PP (IN with) (NP (JJ Irish) (NN oak))) (PP (IN from) (NP (NP (DT the) (NN park)) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (VP (VBN held) (ADVP (RB together)) (PP (IN without) (NP (DT a) (JJ single) (NN nail)))))))))) (. .)))
The Irish oak from the park does not need to be held together with nails, it has natural adhesive abilities.
( ( ( ( The ( Irish oak ) ) ( from ( the park ) ) ) ( ( does not ) ( need ( to ( be ( ( held together ) ( with nails ) ) ) ) ) ) ) ( , ( it ( ( has ( natural ( adhesive abilities ) ) ) . ) ) ) )
(ROOT (S (S (NP (NP (DT The) (JJ Irish) (NN oak)) (PP (IN from) (NP (DT the) (NN park)))) (VP (VBZ does) (RB not) (VP (VB need) (S (VP (TO to) (VP (VB be) (VP (VBN held) (ADVP (RB together)) (PP (IN with) (NP (NNS nails)))))))))) (, ,) (NP (PRP it)) (VP (VBZ has) (NP (JJ natural) (NN adhesive) (NNS abilities))) (. .)))