( ( The ( compound ( carbon dioxide ) ) ) ( ( is ( represented ( by ( ( ( the ( symbol CO2 ) ) , ) ( which ( means ( that ( ( ( a molecule ) ( of ( carbon dioxide ) ) ) ( is ( ( made up ) ( of ( ( ( ( one atom ) ( of carbon ) ) and ) ( ( two atoms ) ( of oxygen ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ compound) (NN carbon) (NN dioxide)) (VP (VBZ is) (VP (VBN represented) (PP (IN by) (NP (NP (DT the) (NN symbol) (NN CO2)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ means) (SBAR (IN that) (S (NP (NP (DT a) (NN molecule)) (PP (IN of) (NP (NN carbon) (NN dioxide)))) (VP (VBZ is) (VP (VBN made) (PRT (RP up)) (PP (IN of) (NP (NP (NP (CD one) (NN atom)) (PP (IN of) (NP (NN carbon)))) (CC and) (NP (NP (CD two) (NNS atoms)) (PP (IN of) (NP (NN oxygen))))))))))))))))) (. .)))
The compound carbon dioxide is represented by the symbol CO2, which means that a molecule of carbon dioxide is made up of one atom of carbon and two atoms of oxygen.
(ROOT (S (NP (NNP Carbon) (NN dioxide) (NNS molecules)) (VP (VBP consist) (PP (IN of) (NP (NP (DT a) (JJ central) (NN carbon) (NN atom)) (VP (VBN bonded) (PP (TO to) (NP (CD two) (NN oxygen) (NNS atoms))))))) (. .)))