it never quite makes it to the boiling point , but manages to sustain a good simmer for most of its running time . 
(ROOT (S (NP (PRP it)) (ADVP (RB never)) (ADVP (RB quite)) (VP (VP (VBZ makes) (NP (PRP it)) (PP (IN to) (NP (DT the) (NN boiling) (NN point)))) (, ,) (CC but) (VP (VBZ manages) (S (VP (TO to) (VP (VB sustain) (NP (DT a) (JJ good) (NN simmer)) (PP (IN for) (NP (NP (JJS most)) (PP (IN of) (NP (PRP$ its) (NN running) (NN time)))))))))) (. .)))
(ROOT (S (NP (PRP )) (ADVP (RB )) (ADVP (RB )) (VP (VP (VBZ ) (NP (PRP )) (PP (IN ) (NP (DT ) (NN ) (NN )))) (, ) (CC ) (VP (VBZ ) (S (VP (TO ) (VP (VB ) (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (NP (JJS )) (PP (IN ) (NP (PRP$ ) (NN ) (NN )))))))))) (. )))