( ( ( high ( ( urea and ) solute ) ) concentration ) . )
(ROOT (NP (NP (JJ high) (NN urea) (CC and) (NN solute)) (NP (NN concentration)) (. .)))
high urea and solute concentration.
(ROOT (S (NP (NNS Animals)) (VP (MD can) (VP (VP (VB transport) (NP (NP (DT the) (NN waste) (NN material)) (VP (VBN known) (PP (IN as) (NP (NP (NN urea)) (PP (IN in) (NP (DT the) (JJ circulatory) (NN system)))))))) (CC and) (VP (VB store) (NP (PRP it)) (ADVP (RB safely)) (PP (IN at) (NP (JJ high) (NNS concentrations)))))) (. .)))