Complex sentence: The Indiana Dunes National Lakeshore, a National Parks Service unit on the shore of Lake Michigan in Indiana, USA, held a bioblitz on May 15th and 16th, 2009.
Split into simpler sentences: The Indiana Dunes National Lakeshore is a National Parks Service unit on the shore of Lake Michigan in Indiana, USA. A bioblitz took place there on May 15th and 16th, 2009.