Utilize the input text as a context reference, choose the right relationship between Roy Hill and iron ore from the options. Options: 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.

Among the claims in separate Federal Court proceedings, the two eldest children allege that Lang Hancock left exploration leases that underpin the soon-to-be completed Roy Hill iron ore mine to his grandchildren, not his daughter.

Answer: product_or_material_produced