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.

Volkswagen's diesel emissions rigging scandal in the United States could reverse the fortunes of refineries with high gasoline output such as Valero's 220,000 barrel per day (bpd) Pembroke refinery in Wales, which has a 49.4 percent gasoline yield, and Exxon Mobil's 273,000 bpd Fawley refinery in southern England, with 41.6 percent gasoline yield, according to consultancy Wood Mackenzie.

Answer: product_or_material_produced