Complex sentence: Originally Muscle Shoals ElectroChemical Corp, it was also owned by Glasrock and later Muscle Shoals Minerals, this facility is an important supplier of high quality magnesia powder.
Split into simpler sentences: Originally Muscle Shoals ElectroChemical Corp, it was also owned by Glasrock and later Muscle Shoals Minerals. This facility is an important supplier of high quality magnesia powder.