Complex sentence: Stalin was born on 6 December 1878, the son of Vissariaon "Beso" Djugashuli and Ekaterina "Keke" Geladze.
Split into simpler sentences: Stalin was born on 6 December 1878. His parents were Vissariaon "Beso" Djugashuli and Ekaterina "Keke" Geladze.