Complex sentence: The Museum of Modern Art in Antwerp (commonly abbreviated as "M HKA", previously "MuHKA") is the contemporary art museum of the city of Antwerp, Belgium, and it is one of the most important art museums in Belgium.
Split into simpler sentences: The Museum of Modern Art in Antwerp (commonly abbreviated as "MuHKA") is the contemporary art museum of the city of Antwerp, Belgium. It is one of the most important art museums in Belgium.