SAO PAULO (Reuters) - Brazil's state-run oil firm Petrobras (PETR4.SA) said on Wednesday it had signed a contract to sell its 20 percent stake in the Bijupira and Salema oil and gas fields for $25 million (16 million pounds).
Take context from the input text and decide on the accurate relationship between 'Petrobras' and 'gas' from the options provided.
Options: product/material produced, chief executive officer, founded by, owned by