the still-inestimable contribution they have made to our shared history 
(ROOT (NP (NP (DT the) (ADJP (RB still) (HYPH -) (JJ inestimable)) (NN contribution)) (SBAR (S (NP (PRP they)) (VP (VBP have) (VP (VBN made) (PP (IN to) (NP (PRP$ our) (VBN shared) (NN history)))))))))
(ROOT (NP (NP (DT ) (ADJP (RB ) (HYPH ) (JJ )) (NN )) (SBAR (S (NP (PRP )) (VP (VBP ) (VP (VBN ) (PP (IN ) (NP (PRP$ ) (VBN ) (NN )))))))))