Assertion: dolomite's amount | /r/HasProperty | less than 3.5%
Facets:
Source sentences:
text: For the production of high grade refractory bricks, the sinter has, as primary requisites, a low amount of contamination from foreign oxides, for example, which is less than 3.5%, and a high density, for example, which is a raw density which is greater than 3.15 g/cm3.