( ( Proposals ( to ( ( extract ( ( oil and ) gas ) ) ( by ( fracking ( in ( the Karoo ) ) ) ) ) ) ) ( ( ( are currently ) ( under consideration ) ) . ) )
(ROOT (S (NP (NNS Proposals) (S (VP (TO to) (VP (VB extract) (NP (NN oil) (CC and) (NN gas)) (PP (IN by) (S (VP (VBG fracking) (PP (IN in) (NP (DT the) (NNP Karoo)))))))))) (VP (VBP are) (ADVP (RB currently)) (PP (IN under) (NP (NN consideration)))) (. .)))
Proposals to extract oil and gas by fracking in the Karoo are currently under consideration.
(ROOT (S (NP (NNP Fracking)) (VP (VBZ delivers) (NP (JJ natural) (NN gas)) (PP (IN from) (NP (NP (NN rock)) (SBAR (WHNP (WDT that)) (S (VP (MD might) (RB not) (ADVP (RB otherwise)) (VP (VB be) (ADJP (JJ obtainable))))))))) (. .)))
Fracking delivers natural gas from rock that might not otherwise be obtainable.