( ( ( The air ) ( breathed ( at ( ground level ) ) ) ) ( ( ( is ( 78.08 % ) ) ( ( nitrogen , ) ( ( ( ( ( ( ( 20.94 % ) oxygen ) , ) ( ( 0.93 % ) argon ) ) , ) and ) ( ( varying amounts ) ( of ( ( ( water vapor ) and ) ( other gases ) ) ) ) ) ) ) . ) )
(ROOT (SINV (S (NP (DT The) (NN air)) (VP (VBD breathed) (PP (IN at) (NP (NN ground) (NN level))))) (VP (VBZ is) (NP (CD 78.08) (NN %))) (NP (NP (NN nitrogen)) (, ,) (NP (NP (NP (CD 20.94) (NN %)) (NP (NN oxygen)) (, ,) (ADVP (NP (CD 0.93) (NN %)) (RB argon))) (, ,) (CC and) (NP (NP (VBG varying) (NNS amounts)) (PP (IN of) (NP (NP (NN water) (NN vapor)) (CC and) (NP (JJ other) (NNS gases))))))) (. .)))
The air breathed at ground level is 78.08% nitrogen, 20.94% oxygen, 0.93% argon, and varying amounts of water vapor and other gases.
(ROOT (S (NP (NNP Nitrogen) (, ,) (NNP oxygen) (CC and) (NNP argon)) (VP (VBP are) (NP (NP (DT the) (CD three) (JJS most) (JJ common) (NNS elements)) (PP (IN in) (NP (NP (DT the) (NN air)) (SBAR (S (NP (PRP we)) (VP (VB breathe)))))))) (. .)))