( ( ( Fermentation ( An ( important way ) ) ) ( of ( ( making ATP ) ( without oxygen ) ) ) ) ( ( is ( called fermentation ) ) . ) )
(ROOT (S (NP (NP (JJ Fermentation) (DT An) (JJ important) (NN way)) (PP (IN of) (S (VP (VBG making) (NP (NNP ATP)) (PP (IN without) (NP (NN oxygen))))))) (VP (VBZ is) (VP (VBN called) (NP (NN fermentation)))) (. .)))
Fermentation   An important way of making ATP without oxygen is called fermentation.
(ROOT (S (NP (NNP Fermentation)) (VP (VBZ is) (NP (NP (DT the) (NN process)) (PP (IN of) (S (VP (VBG making) (NP (NN atp)) (PP (IN without) (NP (NN oxygen)))))))) (. .)))