Complex sentence: In the valley of Copán, in western Honduras the maya civilization ruled for hundreds of years, although not much is known about the region before dynasty 5 and the first king, K'inich Yax K'uk'Mo'.
Split into simpler sentences: In the valley of Copán, in western Honduras the maya civilization ruled for hundreds of years. However, not much is known about the region before dynasty 5 and the first king, K'inich Yax K'uk'Mo'.