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  Bordeaux: Semillon shortage threatens future vintages - decanter.com - the route to all good wine

  https://web.archive.org/web/20080414132852/http://www.decanter.com/news/226273.html

  A group of high profile Bordeaux producers are calling attention to a shortage of Semillon which may impede production in the future.

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  Nebbiolo is viognier cousin, conference hears - decanter.com - the route to all good wine

  https://web.archive.org/web/20090227091736/http://www.decanter.com/news/47718.html

  Nebbiolo, one of Italy’s most famous black grape varieties, is related to the aromatic viognier, DNA boffins have found.

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