Complex sentence: In 1755, the population of Slavo-Serbia numbered 1,513 inhabitants (of both genders), while in 1763, the population numbered 3,992 male inhabitants, of whom only 378 were Serbs.
Split into simpler sentences: In 1755, the population of Slavo-Serbia numbered 1,513 inhabitants (of both genders). In 1763, the population of Slavo-Serbia numbered 3,992 male inhabitants, of whom only 378 were Serbs.