( Methane ( ( is ( ( ( ( the simplest ) ( of ( the ( hydrocarbon compounds ) ) ) ) , ) ( being ( composed ( of ( ( ( one ( carbon atom ) ) and ) ( ( four atoms ) ( of hydrogen ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Methane)) (VP (VBZ is) (NP (NP (DT the) (JJS simplest)) (PP (IN of) (NP (DT the) (NN hydrocarbon) (NNS compounds))) (, ,) (VP (VBG being) (VP (VBN composed) (PP (IN of) (NP (NP (CD one) (NN carbon) (NN atom)) (CC and) (NP (NP (CD four) (NNS atoms)) (PP (IN of) (NP (NN hydrogen)))))))))) (. .)))
Methane is the simplest of the hydrocarbon compounds, being composed of one carbon atom and four atoms of hydrogen.
(ROOT (S (NP (NNS Hydrocarbons)) (VP (VBP are) (VP (VBN made) (PP (IN of) (NP (NP (CD one) (NN carbon)) (CC and) (NP (CD four) (NN hydrogen) (NNS atoms)))))) (. .)))
Hydrocarbons are made of one carbon and four hydrogen atoms.