( ( ( ( ( biological production ) ( of ( alcohol ( or ( methane gas ) ) ) ) ) ( from ( controlled ( microbial digestion ) ) ) ) ( of ( ( ( ( natural and ) indus ) ( - ( trial waste ) ) ) materials ) ) ) ; )
(ROOT (NP (NP (JJ biological) (NN production)) (PP (IN of) (NP (NN alcohol) (CC or) (NN methane) (NN gas))) (PP (IN from) (NP (JJ controlled) (JJ microbial) (NN digestion))) (PP (IN of) (NP (UCP (ADJP (JJ natural) (CC and) (JJ indus)) (: -) (NP (NP (NN trial)) (NP (NN waste)))) (NNS materials))) (: ;)))
biological production of alcohol or methane gas from controlled microbial digestion of natural and indus- trial waste materials;
(ROOT (S (NP (NNS Archaeans)) (VP (VBP produce) (NP (NN methane) (NN gas)) (PP (IN as) (NP (DT a) (NN waste) (NN product)))) (. .)))