Complex sentence: They demanded to cease the construction of the officially sanctioned memorial monument project at the Poklonnaya hill which resulted in a two-hour meeting with then the First Secretary of Moscow City Committee of the Communist Party of the Soviet Union Boris Yeltsin.
Split into simpler sentences: They demanded to cease the construction of the officially sanctioned memorial project at the Poklonnaya hill. It resulted in a two-hour meeting with then the First Secretary of Moscow City Committee of the Communist Party of the Soviet Union Boris Yeltsin.