Complex sentence: On 11 March 2009 Selfmade Records released the sampler "Chronik 2" including the song "Westdeutschlands Kings" which was released online as a "pre-single".
Split into simpler sentences: On 11 March 2009 Selfmade Records released the sampler "Chronik 2". The song "Westdeutschlands Kings" released online as a "pre-single".