In the context of the input sentence, determine the relationship between 'Cameco' and 'uranium'.
Options: headquarters location, parent organization, product/material produced, 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