Complex sentence: People started using the term "Oude" for the old-style Jenever and "Jonge" for the new style, which contains more grain instead of malt and can even contain plain sugar-based alcohol.
Split into simpler sentences: People started using the term "Oude" for the old-style Jenever and "Jonge" for the new style Jenever. The new style contains more grain instead of malt and can even contain plain sugar-based alcohol.