( ( ( ( Unwanted wastes ) and ) ( toxic products ) ) ( ( ( ( are ( left ( in ( the kidneys ) ) ) ) and ) ( ( are then ) ( formed ( into ( a ( liquid ( called urine ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Unwanted) (NNS wastes)) (CC and) (NP (JJ toxic) (NNS products))) (VP (VP (VBP are) (VP (VBN left) (PP (IN in) (NP (DT the) (NNS kidneys))))) (CC and) (VP (VBP are) (RB then) (VP (VBN formed) (PP (IN into) (NP (DT a) (JJ liquid) (VBN called) (NN urine)))))) (. .)))
Unwanted wastes and toxic products are left in the kidneys and are then formed into a liquid called urine.
(ROOT (S (NP (NNP Urine)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (JJ liquid) (NN waste)) (VP (VBN formed) (PP (IN by) (NP (NNS kidneys)))))))) (. .)))