Complex sentence: The Rais massacre, occurring on August 29,1997, was one of Algeria's bloodiest massacres of the 1990s occurred at the village of Rais, near Larbaa and south of Algiers.
Split into simpler sentences: The Rais massacre, occurring on August 29,1997, was one of Algeria's bloodiest massacres of the 1990s. It took place at the village of Rais, near Larbaa and south of Algiers.