( ( ( ( ( ( ( A ( dog 's ) ) ( normal ( heart rate ) ) ) ( is ( ( ( ( 100 to ) 130 ) beats ) ( per minute ) ) ) ) , ) and ) ( ( its ( respiratory rate ) ) ( should ( be ( ( ( about 22 ) breaths ) ( per minute ) ) ) ) ) ) . )
(ROOT (S (S (NP (NP (DT A) (NN dog) (POS 's)) (JJ normal) (NN heart) (NN rate)) (VP (VBZ is) (NP (NP (QP (CD 100) (TO to) (CD 130)) (NNS beats)) (PP (IN per) (NP (NN minute)))))) (, ,) (CC and) (S (NP (PRP$ its) (JJ respiratory) (NN rate)) (VP (MD should) (VP (VB be) (NP (NP (QP (RB about) (CD 22)) (NNS breaths)) (PP (IN per) (NP (NN minute))))))) (. .)))
A dog's normal heart rate is 100 to 130 beats per minute, and its respiratory rate should be about 22 breaths per minute.
(ROOT (S (NP (NP (DT The) (JJ normal) (NN respiratory) (NN rate)) (PP (IN per) (NP (NP (NN minute)) (PP (IN in) (NP (JJ adult) (NNS humans)))))) (VP (VBZ is) (NP (CD 12-18) (NNS breaths))) (. .)))