Random triples
| Subject | Object | 
|---|---|
| gptkb:Dendrochronology | gptkb:wood | 
| gptkb:Dendrochronology | gptkb:charcoal | 
| gptkb:potassium–argon_dating | rocks older than 100,000 years | 
| gptkb:Dendrochronology | historical buildings | 
| gptkb:argon–argon_dating | samples as young as a few thousand years | 
| gptkb:argon–argon_dating | samples as old as billions of years | 
| gptkb:Dendrochronology | gptkb:artifacts |