( ( Lipase assays ) ( ( are ( done ( ( using ( a ( lipid agar ) ) ) ( with ( a ( spirit ( blue dye ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Lipase) (NNS assays)) (VP (VBP are) (VP (VBN done) (S (VP (VBG using) (NP (DT a) (NN lipid) (NN agar)) (PP (IN with) (NP (DT a) (NN spirit) (JJ blue) (NN dye))))))) (. .)))
Lipase assays are done using a lipid agar with a spirit blue dye.
(ROOT (S (NP (NNS Lipids)) (VP (VBP are) (VP (VBN broken) (PRT (RP down)) (PP (IN by) (NP (NNS lipases))))) (. .)))