| http://www.w3.org/ns/prov#value | - eum Corporation, Shell, Total E&P Nigeria Limited and Nigerian Agip Oil Company Limited.Shell Nigeria is the largest oil and gas company in Nigeria, Africa's top energy producer, with an output of more than 1 million barrels of oil or equivalent per day.In October, Shell lawyers said the company has played its part in cleaning up the Delta, which accounts for more than 50 percent of Nigeria's oil
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