sentences: magnesium is flammable & magnesium is a kind of substance -> developments is a flammable bowl magnesium is a flammable substance  developments is a flammable bowl & flammability is a property of substance and includes values of flammable / inflammable -> magnesium is a substance that is flammable magnesium is a substance that is flammable  tool is a hardness that is flammable & if a substance is flammable , it can burn -> magnesium can burn