Utilize the input text as a context reference, choose the right relationship between 'Escondida mine' and 'Copper' from the options.
Options: member of, owned by, product/material produced, developer

Copper will fall by 12 per cent to 1.5 million tonnes essentially because the long-dated reconfiguration of BHP's Escondida mine in Chile will not start driving higher grades until FY17.
product/material produced