In the context of the input sentence, determine the relationship between 'potash mine' and 'Potash'.
Options: position held, headquarters location, director/manager, product/material produced

WINNIPEG, Manitoba, July 30 Potash Corp of Saskatchewan would finish building and would operate the Legacy potash mine owned by rival K+S, if it acquires the German salt and fertilizer producer, Chief Executive Jochen Tilk said on Thursday.
product/material produced