Utilize the input text as a context reference, choose the right relationship between 'S11D' and 'iron ore' from the options.
Options: stock exchange, product/material produced, operator, owned by

Fortescue could be marginal producer ﻿ UBS analyst Glyn Lawcock told the Financial Review that Fortescue could become the marginal producer of the large iron ore players when S11D starts production.
product/material produced