( And ( ( ( nitrogen and ) oxygen ) ( ( make ( ( ( ( ( ( up 60 ) % ) and ) 30 ) % ) ( respectively ( of ( ( the ( Earth 's ) ) atmosphere ) ) ) ) ) . ) ) )
(ROOT (S (CC And) (NP (NN nitrogen) (CC and) (NN oxygen)) (VP (VBP make) (NP (NP (QP (IN up) (CD 60) (NN %) (CC and) (CD 30) (NN %))) (PP (ADVP (RB respectively)) (IN of) (NP (NP (DT the) (NN Earth) (POS 's)) (NN atmosphere))))) (. .)))
And nitrogen and oxygen make up 60% and 30% respectively of the Earth's atmosphere.
(ROOT (S (NP (NN Oxygen) (CC and) (NN nitrogen)) (VP (VBP make) (PRT (RP up)) (NP (NP (JJS most)) (PP (IN of) (NP (NP (DT the) (NN earth) (POS 's)) (NN atmosphere))))) (. .)))
Oxygen and nitrogen make up most of the earth's atmosphere.