Complex sentence: Until the mid 19th Century, Ng'ambo was a small community of African slaves; it then began to grow, and by 1895 it comprised 15 wards and was home to 15,000 people.
Split into simpler sentences: Until the mid 19th Century, Ng'ambo was a small community of African slaves. It then began to grow, and by 1895 it comprised 15 wards and was home to 15,000 people.