( ( A substance ) ( ( used ( to ( solidify ( liquid ( radioactive ( waste 3 ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN substance)) (VP (VBD used) (S (VP (TO to) (VP (VB solidify) (NP (JJ liquid) (JJ radioactive) (NN waste) (CD 3)))))) (. .)))
A substance used to solidify liquid radioactive waste 3.
(ROOT (S (S (VP (ADVP (RB Continually)) (VBG increasing) (NP (NP (DT the) (NN pressure)) (PP (IN on) (NP (DT the) (NN liquid)))))) (VP (MD will) (ADVP (RB eventually)) (VP (VB cause) (NP (DT the) (NN substance) (S (VP (TO to) (VP (VB solidify))))))) (. .)))