Complex sentence: Rytkheu graduated from the Soviet 7-year school in Uelen and wanted to continue his education at the Institute of the Peoples of the North, but he was not selected as one of the students who would be allowed to study there.
Split into simpler sentences: Rytkheu graduated from the Soviet 7-year school in Uelen. He wanted to continue his education at the Institute of the Peoples of the North, but was not selected to study there.