| http://www.w3.org/ns/prov#value | - I think he is the lesson from the news, reported by Canada's Financial Post newspaper and others, that natural gas is the best performing commodity so far in 2013.Prices in the U.S. are up about 30 percent since the start of the year, the paper said.Due to a glut of shale gas, exacerbated by a warm winter, gas reached record lows last spring, dipping below $2 per 1,000 cubic feet, the Associate
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