Complex sentence: Böttger was born in Aschersleben, Germany in 1806 and after attending the primary school there he joined the school of the Franksche Stiftung in Halle an der Saale at the age of eleven.
Split into simpler sentences: Böttger was born in Aschersleben, Germany in 1806. After attending the primary school there he joined the school of the Franksche Stiftung in Halle an der Saale at the age of eleven.