Complex sentence: It is prepared by boiling grounded malt or other type of cereals in water.Then after reaching a certain state of readiness this substance is cooled and undergone a fermentasation process caused by yeast.
Split into simpler sentences: It is prepared by boiling grounded malt or other type of cereals in water. After reaching a certain state of readiness this substance is cooled and undergoes a fermentation process caused by yeast.