Complex sentence: While the practice is more prevalent in cultures where women are regarded by religion as second class citizens, honor killing occurs worldwide, with the United Nations estimating that at the beginning of the 21st century, almost 5000 women were the victims of honor killings every year.
Split into simpler sentences: While the practice is more prevalent in cultures where women are regarded by religion as second class citizens, honor killing occurs worldwide. Since the beginning of the 21st century, the United Nations estimated that almost 5000 women fall victims to honor killings every year.