The Tunnel of Eupalinos can be explored but it's not for the claustrophobic.
( ( ( ( ( ( The Tunnel ) ( of Eupalinos ) ) ( can ( be explored ) ) ) but ) ( it ( ( 's not ) ( for ( the claustrophobic ) ) ) ) ) . )
(ROOT (S (S (NP (NP (DT The) (NN Tunnel)) (PP (IN of) (NP (NNP Eupalinos)))) (VP (MD can) (VP (VB be) (VP (VBN explored))))) (CC but) (S (NP (PRP it)) (VP (VBZ 's) (RB not) (PP (IN for) (NP (DT the) (NN claustrophobic))))) (. .)))
The tunnel of Eupalinos is so large that it is said to have been used to house the construction of the titanic.
( ( ( The tunnel ) ( of Eupalinos ) ) ( ( ( is ( so large ) ) ( that ( it ( is ( said ( to ( have ( been ( used ( to ( house ( ( the construction ) ( of ( the titanic ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN tunnel)) (PP (IN of) (NP (NNP Eupalinos)))) (VP (VBZ is) (ADJP (RB so) (JJ large)) (SBAR (IN that) (S (NP (PRP it)) (VP (VBZ is) (VP (VBN said) (S (VP (TO to) (VP (VB have) (VP (VBN been) (VP (VBN used) (S (VP (TO to) (VP (VB house) (NP (NP (DT the) (NN construction)) (PP (IN of) (NP (DT the) (NN titanic))))))))))))))))) (. .)))