Take context from the input text and decide on the accurate relationship between 'Petrobras' and 'gas' from the options provided.
Options: director/manager, owner of, headquarters location, product/material produced

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