The public is aware of the possibility of biases in the mass media and distrusts the media as too powerful. The body ...

Does anyone have any advice on how to handle the second sentence? "The body of information against which the public evaluates the plausibility of each new media report comes, however, from what the public has heard of through the mass media." After reading the other instructor’s break down of this sentence, I some what understand it but I am still unclear as to how to handle wordy sentences like that in the future. Any advice is appreciated. Thanks.