( ( ( The speed ) ( of sound ) ) ( ( depends ( only ( ( ( ( on ( ( the medium ) ( ( through which ) ( it travels ) ) ) ) , ) not ) ( on ( ( ( ( ( ( ( its frequency ) , ) wavelength ) , ) or ) intensity ) ( -LRB- ( ( until ( ( the intensity ) ( ( gets ( so great ) ) ( that ( ( a ( shock wave ) ) results ) ) ) ) ) -RRB- ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN speed)) (PP (IN of) (NP (NN sound)))) (VP (VBZ depends) (PP (RB only) (PP (IN on) (NP (NP (DT the) (NN medium)) (SBAR (WHPP (IN through) (WHNP (WDT which))) (S (NP (PRP it)) (VP (VBZ travels)))))) (, ,) (RB not) (PP (IN on) (NP (NP (NP (PRP$ its) (NN frequency)) (, ,) (NP (NN wavelength)) (, ,) (CC or) (NP (NN intensity))) (PRN (-LRB- -LRB-) (SBAR (IN until) (S (NP (DT the) (NN intensity)) (VP (VBZ gets) (ADJP (RB so) (JJ great)) (SBAR (IN that) (S (NP (DT a) (NN shock) (NN wave)) (VP (VBZ results))))))) (-RRB- -RRB-)))))) (. .)))
The speed of sound depends only on  the medium through which it travels, not on its frequency, wavelength, or intensity (until the intensity gets so great that a shock wave results).
(ROOT (S (NP (NP (DT The) (NN speed)) (PP (IN of) (NP (NN sound)))) (VP (VBZ depends) (PP (IN on) (NP (NN medium)))) (. .)))
The speed of sound depends on medium.