Complex sentence: There are many ancient remains in Västergötland, and most prominent are probably the dolmens from the Funnelbeaker culture, in the Falköping area south of lake Vänern.
Split into simpler sentences: There are many ancient remains in Västergötland. Most prominent are probably the dolmens from the Funnelbeaker culture, in the Falköping area south of lake Vänern.