( ( ( Brewer 's ) yeast ) ( ( is ( ( a ( single ( cell organism ) ) ) ( of ( ( the ( group ( Saccharomyces Cerevisiae ) ) ) ( ( used ( by ( the brewers ) ) ) ( to ( ( ( ferment ( the ( raw beer ) ) ) and ) ( ( convert ( the carbohydrates ) ) ( to ( alcohol ( and ( carbon dioxide ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Brewer) (POS 's)) (NN yeast)) (VP (VBZ is) (NP (NP (DT a) (JJ single) (NN cell) (NN organism)) (PP (IN of) (NP (NP (DT the) (NN group) (NNP Saccharomyces) (NNP Cerevisiae)) (VP (VBN used) (PP (IN by) (NP (DT the) (NNS brewers))) (S (VP (TO to) (VP (VP (VB ferment) (NP (DT the) (JJ raw) (NN beer))) (CC and) (VP (VB convert) (NP (DT the) (NNS carbohydrates)) (PP (TO to) (NP (NN alcohol) (CC and) (NN carbon) (NN dioxide)))))))))))) (. .)))
Brewer's yeast is a single cell organism of the group Saccharomyces Cerevisiae used by the brewers to ferment the raw beer and convert the carbohydrates to alcohol and carbon dioxide.
(ROOT (S (NP (NNP Beer) (NNS brewers)) (VP (VBP add) (NP (NN yeast)) (PP (TO to) (NP (DT the) (NN wort) (S (VP (TO to) (S (VP (TO to) (VP (VB make) (NP (NN alcohol)))))))))) (. .)))