| http://www.w3.org/ns/prov#value | - El Paso Pipeline Partners LP to buy a 20-percent stake in Colorado Interstate Gas Co. and a 15-percent stake in Southern Natural Gas Co. from El Paso Corp. for $736 millionHouston-based El Paso Pipeline, an owner and operator of natural gas transportation pipelines, storage and other midstream assets, agreed to acquire an additional 30-percent stake in Colorado Interstate, and an additional 15-per
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