| http://www.w3.org/ns/prov#value | - Back in the genre???s halcyon days, the distinction between what is now called ???classic??? rock and ???progressive??? rock was blurred; liking Pink Floyd wasn???t that much of a leap from liking Led Zeppelin, and so on. (Of course, ???progressive??? or ???prog??? rock is a term that was not used all that frequently, if at all, during the ???70???s and early ???80???s.) Even today, a group like R
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