In what country is the company headquartered where Walter van de Vijver was the head of exploration and production until 2004?
Walter van de Vijver:  He was dismissed in 2004 following a scandal about the size of the company's reserves. Royal Dutch Shell: Royal Dutch Shell plc (, ), commonly known as Shell, is a British–Dutch multinational oil and gas company headquartered in the Netherlands and incorporated in the United Kingdom.
i don't know