Refer to the input text as context and select the correct relationship between 'Petrobras' and 'gas' from the available options.
Options: owner of, product/material produced, director/manager, headquarters location

Earlier this year the Financial Times reported that a Petrobras executive had told Brazilian police he received a bribe of $200,000 from Rolls-Royce, which makes gas turbines for Petrobras oil rigs.
product/material produced