Given the input sentence, please extract the subject and object containing a certain relation in the sentence according to the following relation types, in the format of "relation1: word1, word2; relation2: word3, word4". Relations include: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.
Text: Roy Hill boss Barry Fitzgerald has confirmed that the mine is expected to make its first iron ore shipment within weeks, and ramp up to full production of 55 million tonnes in 15 months.
user
product_or_material_produced: Roy Hill, iron ore
assistant