( ( for example ) ( , ( ( AM ( radio stations ) ) ( ( broadcast ( on ( frequencies ( between ( ( ( 550 and ) 1600 ) kHz ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN for) (NP (NN example))) (, ,) (NP (NNP AM) (NN radio) (NNS stations)) (VP (VBD broadcast) (PP (IN on) (NP (NP (NNS frequencies)) (PP (IN between) (NP (QP (CD 550) (CC and) (CD 1600)) (NN kHz)))))) (. .)))
for example, AM radio stations broadcast on frequencies between 550 and 1600 kHz.
(ROOT (S (NP (NNP Am) (NN radio) (NNS waves)) (VP (VBP exist) (PRT (RP in)) (NP (DT the) (ADJP (QP (CD 540) (TO to) (CD 1600))) (NN khz) (NN frequency) (NN range))) (. .)))