Complex sentence: His father was a Sicilian settled first in Tunisia and after in Marseille (South of France) and his mother came from an anti-Franquist (Spaniard) family partly settled in Oran, Algeria and after in Marseille.
Split into simpler sentences: His father was a Sicilian who settled first in Tunisia and later in Marseille (South of France). His mother came from an anti-Franquist (Spaniard) family partly settled in Oran, Algeria and after in Marseille.