Random triples
| Subject | Object |
|---|---|
| gptkb:Three_Mile_Island_Accident | 1979-1993 |
| gptkb:Kalamazoo_River_oil_spill_(2010) | several years |
| gptkb:Santa_Barbara_oil_spill | several months |
| gptkb:Three_Mile_Island_accident | 1979–1993 |
| gptkb:Three_Mile_Island_accident_(1979) | 1979–1993 |