Utilize the input text as a context reference, choose the right relationship between Exxon and diesel from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Europe's most advanced plants such as Exxon Mobil's 320,000 bpd Antwerp refinery, which is planned for a $1 billion upgrade to boost its diesel yield and Royal Dutch Shell's 404,000 bpd Pernis refinery, stand to benefit less from higher gasoline demand.

Answer: product_or_material_produced