( ( Kidney stones ) ( ( are ( ( gravel-like collections ) ( of ( chemicals ( that ( may ( ( ( appear ( in ( ( any area ) ( of ( the ( urinary system ) ) ) ) ) ) , ) ( from ( ( the kidney ) ( to ( the bladder ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Kidney) (NNS stones)) (VP (VBP are) (NP (NP (JJ gravel-like) (NNS collections)) (PP (IN of) (NP (NP (NNS chemicals)) (SBAR (WHNP (WDT that)) (S (VP (MD may) (VP (VB appear) (PP (IN in) (NP (NP (DT any) (NN area)) (PP (IN of) (NP (DT the) (JJ urinary) (NN system))))) (, ,) (PP (IN from) (NP (NP (DT the) (NN kidney)) (PP (TO to) (NP (DT the) (NN bladder))))))))))))) (. .)))
Kidney stones are gravel-like collections of chemicals that may appear in any area of the urinary system, from the kidney to the bladder.
(ROOT (S (NP (JJ Kidney) (NNS stones)) (VP (VBP are) (VP (VBN considered) (NP (NP (DT a) (NN disease)) (SBAR (WHNP (WDT that)) (S (VP (VBZ affects) (NP (DT the) (JJ urinary) (NN system)))))))) (. .)))