Assertion: lignin | /r/MadeOf | g and s units
Facets:
value: mostly
type: DEGREE
value: in woody plants
type: LOCATION
Source sentences:
text: In herbaceous crops, lignin contains H, G, and S monolignols in different proportions, whereas in woody plants, lignin contains mostly G and S units (Billa et al. 1998; Lapierre et al. 1995).