Complex sentence: The establishment of the UN Safe Areas is today considered as one of the most controversial decisions of the United Nations as the resolution was unclear about the procedure by which these safe areas were to be protected in a war zone such as Bosnia and Herzegovina.
Split into simpler sentences: The establishment of the UN Safe Areas is considered today to be one of the most controversial decisions of the United Nations. The resolution was unclear about the procedure by which these safe areas were to be protected in a war zone like Bosnia and Herzegovina.