Take context from the input text and decide on the accurate relationship between 'Oando' and 'Petroleum' from the options provided.
Options: owned by, product/material produced, owner of, subsidiary

The equities are Beco Petroleum Product Plc, Conoil Plc, Eterna Plc, Forte Oil PLC, Mobil Oil Nigeria Plc, MRS Oil Nigeria Plc, Total Nigeria Plc, Oando Plc and Seplat Petroleum Development Company Plc.
product/material produced