Complex sentence: The popularity of Ranković's nationalistic policies in Serbia became apparent at Ranković's funeral in Serbia in 1983 where large numbers of people attended the funeral and many considered Ranković a Serbian "national" leader.
Split into simpler sentences: The popularity of Ranković's nationalistic policies in Serbia became apparent at his funeral in 1983, where large numbers of people attended the funeral. Many considered Ranković a Serbian "national" leader.