Random triples
| Subject | Object |
|---|---|
| gptkb:Kupol_Mine | underground mining |
| gptkb:The_Cripple_Creek_Gold_Rush | placer mining |
| gptkb:Consolidated_Virginia_Mine | hard rock mining |
| gptkb:Long_Canyon_Mine | open-pit mining |
| gptkb:The_Cripple_Creek_Gold_Rush | hard rock mining |
| gptkb:Fraser_River_Gold_Rush | placer mining |