The troubles at Yuganskneftegas come as Gazprom , the giant state-controlled energy company , is poised to buy the privately held Sibneft , Russia 's fifth-largest oil producer with more than 900,000 barrels a day , from Roman Abramovich , a Russian tycoon based in London .
Roman Abramovich /people/person/nationality Russia
Russian /people/ethnicity/geographic_distribution Russia
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Roman Abramovich
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Russia
LOCATION
/people/person/nationality
Russian
LOCATION
Russia
LOCATION
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