( ( ( ( Introduction , ) ( Theory ( of ( Gas Kinetics ) ) ) ) , ) ( Mechanisms . ) )
(ROOT (S (NP (NP (NNP Introduction)) (, ,) (NP (NP (NNP Theory)) (PP (IN of) (NP (NNP Gas) (NNPS Kinetics)))) (, ,)) (VP (VBZ Mechanisms)) (. .)))
Introduction, Theory of Gas Kinetics, Mechanisms.
(ROOT (S (NP (NP (DT The) (NN behavior)) (PP (IN of) (NP (JJ ideal) (NNS gases)))) (VP (VBZ is) (VP (VBN explained) (PP (IN by) (NP (JJ kinetic) (JJ molecular) (NN theory))))) (. .)))
The behavior of ideal gases is explained by kinetic molecular theory.