( ( density ( altitude ( pressure altitude ) ) ) ( ( corrected ( for ( air temperature ) ) ) . ) )
(ROOT (S (NP (JJ density) (NN altitude) (NN pressure) (NN altitude)) (VP (VBN corrected) (PP (IN for) (NP (NN air) (NN temperature)))) (. .)))
density altitude pressure altitude corrected for air temperature.
(ROOT (S (NP (NNP Air) (NN temperature)) (VP (VBZ changes) (PP (IN as) (NP (NN altitude) (NNS increases)))) (. .)))