What is the relationship between 'Petrobras' and 'gas' in the context of the input sentence.
Options: product/material produced, member of, subsidiary, owned by

Justin Solomon | CNBC Petrobras gas station in Brazil Petrobras has more than $100 billion in debt and a further downturn in the company could lead to widespread economic problems, given Brazil is one of the largest oil producers in the world, Cramer added.
product/material produced