Category talk:Provincial federations of labour (Canada)

Why was this category moved?
It says in the history of this Category:
 * 2 April 2013‎ Cydebot (talk | contribs)‎ . . (138 bytes) (+138)‎ . . (Robot: Moved from Category:National trade unions centers by country. Authors: The Bushranger, Bellerophon5685)

I am just curious about why this happened? Was there a discussion somewhere? XOttawahitech (talk) 14:46, 16 May 2013 (UTC)