Assertion: lignin | /r/HasProperty | difficult to separate
Facets:
value: because of its complex structure
type: CAUSE
value: because of multiple links
type: CAUSE
value: earlier
type: TEMPORAL
Source sentences:
text: As noted earlier, lignin was difficult to separate from the WS powder because of the recalcitrant properties of the lignin.
text: Because of its complex structure and multiple links that form the lignin macromolecule, lignin is more difficult to separate than other polymers.