Complex sentence: Nordisk Film Kompagni eventually sold 259 prints of "Løvejagten", which earned the company an enormous profit, and ushered in the "golden age" of Danish cinema when Nordisk Film became the most productive film company in Europe.
Split into simpler sentences: Nordisk Film Kompagni eventually sold 259 prints of "Løvejagten", which earned the company an enormous profit. It ushered in the "golden age" of Danish cinema when Nordisk Film became the most productive film company in Europe.