Complex sentence: In 1551, the population of the island of Gozo (around 5,000 people) were taken as slaves by Barbary corsairs and brought to the Barbary coast in present day Libya.
Split into simpler sentences: In 1551, the population of the island of Gozo (around 5,000 people) were taken as slaves by Barbary corsairs. They were taken to the Barbary coast in present day Libya.