Complex sentence: In West African cuisine, potasium nitrate (salt petre) is widely used as a thickening agent in soups and stews such as okro soup and Isi Ewu.
Split into simpler sentences: In West African cuisine, potasium nitrate (salt petre) is widely used. It is used as a thickening agent in soups and stews such as and okro soup and Isi Ewu.