The cousin, Dagmar Simova, has been the media's main source of information about Albright's wartime experience.
The media has failed to disclose it's main source of information about Albright's experience. 
mnli hypothesis: The media has failed to disclose it's main source of information about Albright's experience.  premise: The cousin, Dagmar Simova, has been the media's main source of information about Albright's wartime experience.