( ( When ( recovered ( as ( ( a by-product ) ( of ( beer making ) ) ) ) ) ) ( , ( ( ( brewer 's ) yeast ) ( ( ( ( ( is typically ) ( grown ( on ( ( ( grain , ) ( usually barley ) ) , ) ) ) ) and ) ( has ( a ( bitter ( , ( unpalatable taste ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (WHADVP (WRB When)) (S (VP (VBD recovered) (PP (IN as) (NP (NP (DT a) (NN by-product)) (PP (IN of) (NP (NN beer) (NN making)))))))) (, ,) (NP (NP (NN brewer) (POS 's)) (NN yeast)) (VP (VP (VBZ is) (ADVP (RB typically)) (VP (VBN grown) (PP (IN on) (NP (NP (NN grain)) (, ,) (NP (RB usually) (NN barley)) (, ,))))) (CC and) (VP (VBZ has) (NP (DT a) (JJ bitter) (, ,) (JJ unpalatable) (NN taste)))) (. .)))
When recovered as a by-product of beer making, brewer's yeast is typically grown on grain, usually barley, and has a bitter, unpalatable taste.
(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)))))))))) (. .)))