Solera by the producers of sherry. In a Spanish sherry "solera", the vintner may transfer about a third of each barrel a year. A solera sherry has to be at least three years old when bottled. A quite similar process is called sostrera, used to produce fortified wines in the Mediterranean regions of France. In Sicily, where Marsala wine is made, the system is called "in perpetuum". Solera vinification is used in the making of Mavrodafni ("Black Laurel"), a fortified red dessert wine made in the Northern Peloponnese in Greece. Exceptional "Mavrodafni" vintages are released every 20 or 30 years: they
Flavored fortified wine MD 20/20, Night Train, Thunderbird, and Wild Irish Rose. The Liquor Control Board approved these restrictions on 30 August 2006. The cities of Tacoma, Washington and Spokane, Washington also followed suit in instituting "Alcohol Impact Areas" of their own following Seattle's example. Flavored fortified wines have appeared in numerous songs as well as other media forms. Flavored fortified wine inspired the Guns N' Roses song "Nightrain". ZZ Top (on "Fandango!"), Seasick Steve, (on "I Started Out with Nothin and I Still Got Most of It Left"), and They Might Be Giants (on "The Spine") have all recorded songs titled "Thunderbird".