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In 2008-2009. Wikipedia underwent a licensing transition. Until this was completed, Wikipedia was licensed so as to permit importing text under GNU Free Documentation License (GFDL). All such imported text was automatically co-licensed under GFDL and CC-By-SA following license transition of June 16, 2009. However, if the content was not imported prior to 1 November 2008, its presence on Wikipedia is inconsistent with Wikipedia's copyright policy and in accordance with copyright policy it must be removed.