Complex sentence: The Baltimore Convention Center is a convention and exhibition hall, located in Downtown Baltimore, Maryland, managed and operated by BACVA, a semi-private association started in 1980 by former Baltimore mayor William Donald Schaefer.
Split into simpler sentences: The Baltimore Convention Center is a convention and exhibition hall located in downtown Baltimore, Maryland. It is managed and operated by the Baltimore Area Convention and Visitors Association, a semi-private association started in 1980 by former Baltimore mayor William Donald Schaefer.