Complex sentence: The Department of Posts inaugurated the National Philatelic Museum on 11 July 2011 which will exhibit rare postage stamps from across the world and also provide a platform to philatelists to exhibit their collections.
Split into simpler sentences: The Department of Posts inaugurated the National Philatelic Museum on 11 July 2011. It exhibits rare postage stamps from around the world and provides a venue for philatelists to exhibit their collections.