Complex sentence: The Kaiser Wilhelm Gesellschaft (KWG) was founded in 1911 in order to promote the natural sciences in Germany, by founding and maintaining research institutions formally independent from the state and its administrations.
Split into simpler sentences: The Kaiser Wilhelm Gesellschaft (KWG, Kaiser Wilhelm Society) was founded in 1911. The purpose of the KWG was to promote the (natural) sciences in Germany, specifically by founding and maintaining research institutions formally independent from the state and its administrations.