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.
Take context from the input text and decide on the accurate relationship between 'Cameco' and 'uranium' from the options provided.
Options: product/material produced, headquarters location, distribution format, parent organization