What is the relationship between Cameco and uranium in the context of the input sentence. Choose an answer from: 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.

As you mentioned already, Russian suspension agreement has been in effect in one form or another since I think 1992 and came out of an anti-dumping action started by U.S. uranium producers back brand Cameco is U.S. uranium mining subsidiaries, power resources in Wyoming and resources in Nebraska, have been active participants in the discussions and negotiations concerning the RSA since auctioned back then, and that continues today.

Answer: product_or_material_produced