( ( Explain ( kinetic ( molecular theory ) ) ) . )
(ROOT (S (VP (VB Explain) (NP (JJ kinetic) (JJ molecular) (NN theory))) (. .)))
Explain kinetic molecular theory.
(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.