( Batali ( ( is ( ( a critic ) ( of ( ( ( hydraulic fracturing ) , ) ( commonly ( known ( as ( ( fracking , ) ( ( a method ) ( of ( natural ( gas extraction ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Batali)) (VP (VBZ is) (NP (NP (DT a) (NN critic)) (PP (IN of) (NP (NP (JJ hydraulic) (NN fracturing)) (, ,) (VP (ADVP (RB commonly)) (VBN known) (PP (IN as) (NP (NP (NN fracking)) (, ,) (NP (NP (DT a) (NN method)) (PP (IN of) (NP (JJ natural) (NN gas) (NN extraction))))))))))) (. .)))
Batali is a critic of hydraulic fracturing, commonly known as fracking, a method of natural gas extraction.
(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.