Utilize the input text as a context reference, choose the right relationship between Cameco and uranium 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.

While it’s good for Cameco to restart Cigar Lake, the restart does not change the fact that there remains tremendous uncertainty about uranium supply as the pandemic continues to cause unplanned supply disruptions added to the planned supply discipline that has already been undertaken.

Answer: product_or_material_produced