( ( During exercise ) ( , ( ( the cells ) ( ( burn ( oxygen ( faster ( to ( ( produce ( more energy ) ) ( for ( ( ( the body ) , ) ( which ( ( creates ( more ( carbon dioxide ) ) ) ( as ( a ( waste product ) ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN During) (NP (NN exercise))) (, ,) (NP (DT the) (NNS cells)) (VP (VBP burn) (S (NP (NN oxygen)) (ADJP (JJR faster) (S (VP (TO to) (VP (VB produce) (NP (JJR more) (NN energy)) (PP (IN for) (NP (NP (DT the) (NN body)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ creates) (NP (JJR more) (NN carbon) (NN dioxide)) (PP (IN as) (NP (DT a) (NN waste) (NN product)))))))))))))) (. .)))
During exercise, the cells burn oxygen faster to produce more energy for the body, which creates more carbon dioxide as a waste product.
(ROOT (S (PP (IN In) (NP (DT the) (NN body))) (, ,) (S (NP (NN oxygen)) (VP (VBZ is) (VP (VBN used) (PP (IN by) (NP (NP (NNS cells)) (PP (IN of) (NP (NP (DT the) (NN body) (POS 's)) (NNS tissues)))))))) (CC and) (S (NP (NN carbon) (NN dioxide)) (VP (VBZ is) (VP (VBN produced) (PP (IN as) (NP (DT a) (NN waste) (NN product)))))) (. .)))