| http://www.w3.org/ns/prov#value | - Since reaching its peak in the 1970s, Playboy has seen a decline in circulation and cultural relevance because of increased competition in the field it founded ??? first from Penthouse, Oui, and Gallery in the 1970s; later from pornographic videos; and more recently from lad mags such as Maxim, FHM, and Stuff.
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