Complex sentence: Al Rajhi Tower in Riyadh, Saudi Arabia is a proposed $480 million USD tower announced May 13,2006, set to become the tallest building in Saudi Arabia.
Split into simpler sentences: Al Rajhi Tower in Riyadh, Saudi Arabia is a new "$480 million USD" tower announced May 13,2006. Plans have been hatched for what is set to become the tallest building in Saudi Arabia.