However, the industry's chamber of mines, said that production would drop below 1 million tonnes due to Glencore (Xetra: A1JAGV - news ) 's suspension of operations at its Katanga Mining (Toronto: KAT.TO - news ) unit, one of Congo's largest copper mines.
In the context of the input sentence, determine the relationship between 'Katanga Mining' and 'Glencore'.
Options: original broadcaster, location of formation, position held, parent organization