Assertion: bone | /r/HasProperty | 25% organic material
Facets:
value: by weight
type: OTHER
Source sentences:
text: The fibers are impregnated with a form of calcium phosphate similar to hydroxyapatite as well as with substantial quantities of carbonate, citrate, sodium, and magnesium; by weight, bone is composed of 75% inorganic material and 25% organic material.