Assertion: fresco | /r/HasProperty | permanent
Facets:
value: because of their chemical composition
type: CAUSE
value: mostly
type: DEGREE
Source sentences:
text: Also, fresco is permanent because the paint joins with the plaster so that the colours will not rub off.
text: Frescos are mostly permanent because of their chemical composition:
text: Because of their chemical composition, frescoes are permanent unless they are affected by damaging outside forces.