Complex sentence: In August 2015, a "Breitbart" writer reported on false claims that King had misrepresented his biracial identity, based on information from his birth certificate, which lists white parents.
Split into simpler sentences: In August 2015, a "Breitbart" writer reported on false claims that King had misrepresented his biracial identity. A right-wing blogger made this claim based on information from his birth certificate, which lists white parents.