( Hydrocarbons ( ( are ( used ( for ( ( fuel and ) ( other ( ( economically important ) materials ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Hydrocarbons)) (VP (VBP are) (VP (VBN used) (PP (IN for) (NP (NP (NN fuel)) (CC and) (NP (JJ other) (ADJP (RB economically) (JJ important)) (NNS materials)))))) (. .)))
Hydrocarbons are used for fuel and other economically important materials.
(ROOT (S (NP (NP (JJ Hydrocarbons) (NNS compounds)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VP (VBP serve) (PP (IN as) (NP (NNS fuels)))) (CC and) (VP (VBP are) (VP (VBN used) (PP (IN in) (NP (NN manufacturing)))))))) (, ,)) (VP (VBP are) (VP (VBN called) (NP (NP (DT the) (VBG driving) (NN force)) (PP (IN of) (NP (JJ western) (NN civilization)))))) (. .)))