Random triples
| Subject | Object |
|---|---|
| gptkb:Central_Wales_Orefield | 20th century |
| gptkb:Cobalt-Gowganda_region | mid-20th century |
| gptkb:Freiberg_mining_region | 20th century |
| gptkb:Mesabi_Range | mid-20th century |
| Subject | Object |
|---|---|
| gptkb:Central_Wales_Orefield | 20th century |
| gptkb:Cobalt-Gowganda_region | mid-20th century |
| gptkb:Freiberg_mining_region | 20th century |
| gptkb:Mesabi_Range | mid-20th century |