that sometimes the dreams of youth should remain just that 
(ROOT (SBAR (IN that) (S (ADVP (RB sometimes)) (NP (NP (DT the) (NNS dreams)) (PP (IN of) (NP (NN youth)))) (VP (MD should) (VP (VB remain) (NP (RB just) (DT that)))))))
(ROOT (SBAR (IN ) (S (ADVP (RB )) (NP (NP (DT ) (NNS )) (PP (IN ) (NP (NN )))) (VP (MD ) (VP (VB ) (NP (RB ) (DT )))))))