Assertion: body's tissue | /r/MadeOf | 6 to 90 milligrams of silica
Facets:
value: per 100 grams dry weight
type: OTHER
value: often
type: TEMPORAL
Source sentences:
text: Indeed, human tissue often contains 6 to 90 milligrams of silica (SiO 2 ) per 100 grams dry weight, and many plants and lower forms of life assimilate silica and use it in their structures.