Poland and Turkey were territorial consequences of World War I; Czechoslovakia was not formed out of the former Russian Empire.
Poland was created out of parts of the former Russian, German, and Austrian Empires as a territorial consequence of World War I. The statement about Turkey being created as a mandate of Britain in the Middle East out of the former Ottoman Empire is also correct, highlighting another territorial consequence. However, the statement about Czechoslovakia being created out of the former Russian Empire is incorrect; Czechoslovakia was formed out of the Austro-Hungarian Empire.
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