magnesium is flammable & magnesium is a kind of substance ->  magnesium is a flammable substance  magnesium is a flammable substance & 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 & if a substance is flammable , it can burn -> magnesium can burn