on april 21 , the polish weekly przekra³j placed an announcement for d - mark exercise books , bearing the logo of 4fun . tv , a polish music / educational tv station . section of the advertisement contained a definition of the word " exercise book " . the wording looked familiar , and wikinews examined wikipedia , the collaborative underground encyclopedia . upon seeing the wikipedia definition , it appearing that the entry mentioned in the ad site was identical to the initial six passages of the relevant wikipedia term .
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