Complex sentence: There are around 20,000 Catholics in Morocco, most of them are European expatriates, with a big majority of French and Spanish from colonization and post-independence, the second group is composed of Sub-Saharan immigrants, mainly students.
Split into simpler sentences: There are around 20,000 Catholics in Morocco; most of them are European expatriates, with a big majority of French and Spanish from colonization and post-independence. The second group is composed of Sub-Saharan immigrants, mainly students.