Complex sentence: Alexander Stephens, Vice President of the Confederacy, gives the infamous Cornerstone Speech in Savannah, Georgia, in which he declares that slavery is the natural condition of blacks and the foundation of the Confederacy.
Split into simpler sentences: Alexander Stephens, Vice President of the Confederacy, gives the infamous Cornerstone Speech in Savannah, Georgia. In which he declared that slavery was the natural condition of blacks and the foundation of the Confederacy.