The test content originating from Wikipedia is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported license . Additionally, the Czech Wikipedia content (cs.html and cs.txt) is said to contain text from the Web site http://astro.pef.zcu.cz/ (no longer available) subject to the GNU Free Documentation License . The source documents are: ar: https://ar.wikipedia.org/w/index.php?title=%D8%A7%D9%84%D9%85%D8%B1%D9%8A%D8%AE&oldid=21144485 cs: https://cs.wikipedia.org/w/index.php?title=Mars_(planeta)&oldid=13893284 de: https://de.wikipedia.org/w/index.php?title=Mars_(Planet)&oldid=158965843 el: https://el.wikipedia.org/w/index.php?title=%CE%86%CF%81%CE%B7%CF%82_(%CF%80%CE%BB%CE%B1%CE%BD%CE%AE%CF%84%CE%B7%CF%82)&oldid=6080112 en: https://en.wikipedia.org/w/index.php?title=Mars&oldid=745952583 fr: https://fr.wikipedia.org/w/index.php?title=Mars_(plan%C3%A8te)&oldid=131105854 he: https://he.wikipedia.org/w/index.php?title=%D7%9E%D7%90%D7%93%D7%99%D7%9D&oldid=19501222 ja: https://ja.wikipedia.org/w/index.php?title=%E7%81%AB%E6%98%9F&oldid=61095795 ko: https://ko.wikipedia.org/w/index.php?title=%ED%99%94%EC%84%B1&oldid=17394891 pt: https://pt.wikipedia.org/w/index.php?title=Marte_(planeta)&oldid=47051562 ru: https://ru.wikipedia.org/w/index.php?title=%D0%9C%D0%B0%D1%80%D1%81&oldid=81533008 th: https://th.wikipedia.org/w/index.php?title=%E0%B8%94%E0%B8%B2%E0%B8%A7%E0%B8%AD%E0%B8%B1%E0%B8%87%E0%B8%84%E0%B8%B2%E0%B8%A3&oldid=6511628 tr: https://tr.wikipedia.org/w/index.php?title=Mars&oldid=17608551 vi: https://vi.wikipedia.org/w/index.php?title=Sao_H%E1%BB%8Fa&oldid=24192627 zh_cn: https://zh.wikipedia.org/w/index.php?title=%E7%81%AB%E6%98%9F&variant=zh-cn&oldid=41736649 zh_tw: https://zh.wikipedia.org/w/index.php?title=%E7%81%AB%E6%98%9F&variant=zh-tw&oldid=41736649 binary: https://upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Water_ice_clouds_hanging_above_Tharsis_PIA02653_black_background.jpg/240px-Water_ice_clouds_hanging_above_Tharsis_PIA02653_black_background.jpg # To avoid glibc choking, the characters 无 and / have been removed from zh_tw.