IMF asset selloff

IMF have talked about how europeen banks may have to sell of 4,3trill in assets in 2013. Can someone help me understand what these assets are?

Probably land, homes, facilities they have fleeced off hard working citizens over the years.

they could also sell, mortgages to other banks, financial instruments, gold, currency, debts, remember that a mortgage for us is a liability but for banks is an asset because they receive income from it. And who knows they could sell they mothers.

Thanl you both vert much!