( ( Everywhere ( on earth ) ) ( , ( oxygen ( ( ( makes up ) ( ( 20.96 % ) ( of ( ( ( the gas ) ( in air ) ) ( -LRB- ( ( ( almost ( all ( the rest ) ) ) ( is nitrogen ) ) -RRB- ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (ADVP (RB Everywhere)) (IN on) (NP (NN earth))) (, ,) (NP (NN oxygen)) (VP (VBZ makes) (PRT (RP up)) (NP (NP (CD 20.96) (NN %)) (PP (IN of) (NP (NP (DT the) (NN gas)) (PP (IN in) (NP (NN air))) (PRN (-LRB- -LRB-) (S (NP (RB almost) (PDT all) (DT the) (NN rest)) (VP (VBZ is) (NP (NN nitrogen)))) (-RRB- -RRB-)))))) (. .)))
Everywhere on earth, oxygen makes up 20.96% of the gas in air (almost all the rest is nitrogen).
(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.