( ( Without oxygen ) ( ( the respiration ) ( ( ( ( ( does not ) ( release ( all ( the energy ) ) ) ) and ) ( is ( called ( anaerobic respiration ) ) ) ) . ) ) )
(ROOT (S (PP (IN Without) (NP (NN oxygen))) (NP (DT the) (NN respiration)) (VP (VP (VBZ does) (RB not) (VP (VB release) (NP (PDT all) (DT the) (NN energy)))) (CC and) (VP (VBZ is) (VP (VBN called) (NP (JJ anaerobic) (NN respiration))))) (. .)))
Without oxygen the respiration does not release all the energy and is called anaerobic respiration.
(ROOT (S (NP (JJ Anaerobic) (NN respiration)) (VP (VBZ occurs) (SBAR (IN if) (S (NP (NN oxygen)) (VP (MD can) (RB not) (VP (VB be) (VP (VBN obtained) (PP (IN at) (NP (DT a) (JJ sufficient) (NN rate))))))))) (. .)))