Assertion: cellulose | /r/HasProperty | extracted using a four-step process
Facets:
value: in the first part
type: TEMPORAL
Source sentences:
text: In the first part, the cellulose was extracted using a four-step process involving sequential treatment of the biomass by EtOH, H 2 O 2 , NaOH, and HCl, after which the cellulose was left as an insoluble fraction.