| http://www.w3.org/ns/prov#value | - By Christopher Elliott | January 24, 2014 Rolf Potts took his first extended trip ??? an eight-month journey across North America ??? two decades ago, and he hasn???t stopped. ???I???ve traveled independently on every continent except Antarctica for as long as two years at a time, often for less money than it would cost me to live a rooted life in a major American city,??? says Potts, the author o
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