Site searching based upon independents

[Cammorak]

This is most likely a rank newbie question, but I have yet to find an answer through searching to forums. Do magic sites affect indie composition when you attack the site?

For instance, if I attack a province with the standard infantry/archer combo for whatever age I'm playing but also find that it contains a fire and water wizard, does that imply that there is an Academy of High Magics in the province or are the two events unrelated?