When you open the media workspace, you will be in "Collection View" (see the tabs at top: Collection and Detail.
Now, choose the Collection from the left hand side and choose the media item from the right hand panel.
Now, click on the "Detail" tab at the top.
You will now convert to the "Detail" screen for just that photo. In the lower left of that panel is the Usage report for that photo.
If the media is directly attached to five facts for that person, there are five lines showing each person and fact.
If the media is attached to a source citation, the name of the source shows in the name spot and the "fact" space is left blank. Now, double click on that source name and the source citation window opens up. You will note in the upper right of that screen a link that says "Linked to 152 facts". Click on that link and you will see the list of 152 persons and associated facts that citation is linked to.
Does that help?