Analyze the relationship between 'Cameco' and 'uranium' within the context of the input sentence.
Options: product/material produced, headquarters location, parent organization, distribution format

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.
product/material produced