( ( The ( sclerotial density ) ) ( ( can ( be ( used ( as ( ( the ( groups ( G2 ( and ( G3 float ) ) ) ) ) ( in water ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ sclerotial) (NN density)) (VP (MD can) (VP (VB be) (VP (VBN used) (PP (IN as) (NP (NP (DT the) (NNS groups) (NN G2) (CC and) (NN G3) (NN float)) (PP (IN in) (NP (NN water)))))))) (. .)))
The sclerotial density can be used as the groups G2 and G3 float in water.
(ROOT (S (NP (NNP Density)) (VP (VBZ allows) (SBAR (S (NP (NN cut)) (VP (VBZ logs) (S (VP (TO to) (VP (VB float) (PP (IN on) (NP (NN water)))))))))) (. .)))