Complex sentence: The Irish were first sent to the island as indentured and unpaid servants by Oliver Cromwell during the early to mid 17th century, they were treated harshly and had to live in depraved conditions.
Split into simpler sentences: The Irish were first sent to the island as indentured and unpaid servants by Oliver Cromwell during the early to mid 17th century. They were treated harshly and had to live in depraved conditions.