Complex sentence: The PBCom Tower is an office skyscraper that currently hold the title as the tallest building in the Philippines, which it hold since 2000, and the ninety-ninth (as of 2008) tallest building in the world.
Split into simpler sentences: The PBCom Tower is an office skyscraper that currently holds the title, since 2000, of the tallest building in the Philippines. It is also the ninety-ninth (as of 2008) tallest building in the world.