on july 21 , the polish weekly przekroj published an app for dan - mark exercise products , containing the sign of 4fun . tv , a polish music / interactive tv station . part of the advertisement contained a definition of the word " exercise book " . the compromise looked familiar , and wikinews consulted wikipedia , the collaborated online encyclopedia . upon seeing the wikipedia definition , it appeared that the entry quoted in the promotional material was identical to the initial two paragraphs of the relevant online entry .
Readers of online encyclopedias can edit the contents.