Complex sentence: Angela Davis, an activist, scholar, and author believes that the media purposely prevented people from understanding the case of Mumia, and that they wanted to keep the public unaware to make sure there would not be large numbers of people supporting his campaign.
Split into simpler sentences: Angela Davis, an activist, scholar, and author believes that the media purposely prevented people from understanding the case of Mumia. They wanted to keep the public unaware to make sure there would not be large numbers of people supporting his campaign.