Refer to the input text as context and select the correct relationship between 'Petrobras' and 'gas' from the available options.
Options: subsidiary, owned by, member of, product/material produced

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