Complex sentence: Renamed Humboldt Forum, the new plan has gained political support and funding, however the Humboldt Box itself is in private ownership, as neither the federal government nor the Berlin Senate wanted to finance it.
Split into simpler sentences: Renamed Humboldt Forum, this new plan has gained political support and funding. The Humboldt Box itself is in private ownership, as neither the federal government nor the Berlin Senate wanted to finance it.