Complex sentence: Clara Germana Cele was a Christian woman, who in 1906, was said to be possessed by a demon when she was a sixteen year old school girl at St. Michael's Mission in Natal, South Africa.
Split into simpler sentences: Clara Germana Cele was a Christian woman, who in 1906, was said to be possessed by a demon. She is said to have been possessed when she was a sixteen year old school girl at St. Michael's Mission in Natal, South Africa.