Premier Mine
The Premier Mine is an underground diamond mine owned by Petra Diamonds in the town of Cullinan , east of Pretoria , Gauteng Province , South Africa . 
<triplet> Premier Mine <subj> diamond <obj> product or material produced <subj> Petra Diamonds <obj> operator <subj> Gauteng Province <obj> located in the administrative territorial entity <subj> South Africa <obj> country <triplet> Cullinan <subj> South Africa <obj> country <triplet> Gauteng Province <subj> South Africa <obj> country <triplet> South Africa <subj> Gauteng Province <obj> contains administrative territorial entity