an Entity references as follows:
CNOOC Petroleum North America ULC, formerly known as Nexen, is a Canadian oil and gas company based in Calgary, Alberta. Originally the Canadian subsidiary of US-based Occidental Petroleum (known as Canadian Occidental Petroleum or CanOxy), it became an independent company, Nexen, in 2000. Nexen was acquired by Hong Kong-based CNOOC Limited in 2013, and was rebranded under the current name at the end of 2018.