Complex sentence: Pyongyang is located on the Taedong River about upstream from its mouth on the Yellow Sea and, according to preliminary results from the 2008 population census, has a population of 3,255,388.
Split into simpler sentences: Pyongyang is located on the Taedong River about upstream from its mouth on the Yellow Sea. According to preliminary results from the 2008 population census, it has a population of 3,255,388.