Utilize the input text as a context reference, choose the right relationship between Petrobras and Gas 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.

Today we have with us Roberto Castello Branco, Petrobras CEO; Andrea Almeida, Chief Financial and Investor Relations Officer; Anelise Lara, Chief Refining and Natural Gas Officer; André Chiarini, Chief Logistics Officer; Carlos Alberto Pereira de Oliveira, Chief Exploration and Production Officer; Marcelo Zenkner, Chief Governance and Compliance Officer; Nicolás Simone, Chief Digital Transformation and Innovation Officer; Roberto Ardenghy, Chief Institutional Relations Officer; and Rudimar Lorenzatto, Chief Production Development Officer.

Answer: product_or_material_produced