Assertion: gallic acid | /r/HasProperty | substance
Facets:
value: among other early investigators of palimpsests
type: OTHER
Source sentences:
text: Gallic acid, substance occurring in many plants, either in the free state or combined as gallotannin.
text: Gallic acid was one of the substances used by Angelo Mai (1782–1854), among other early investigators of palimpsests, to clear the top layer of text off and reveal hidden manuscripts underneath.