First of all, you have to understand that this body or any field of action, anywhere, the three things are there: the field of activities, the owner of the field and the supervisor of the field. You can check and tally anywhere: Revision history
Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.