Chad nationalises former ExxonMobil firm after disputed sale
Chad has announced it has nationalised a former subsidiary of US oil and gas giant ExxonMobil, whose sale to a British company last year it had contested.
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### Instruction: Chad nationalises former ExxonMobil firm after disputed sale

### Response: Chad has announced it has nationalised a former subsidiary of US oil and gas giant ExxonMobil, whose sale to a British company last year it had contested.