Random triples
| Subject | Object |
|---|---|
| gptkb:1948_Donora_smog | fluorine |
| gptkb:1948_Donora_smog | gptkb:aerosol |
| gptkb:1948_Donora_smog | sulfur dioxide |
| Subject | Object |
|---|---|
| gptkb:1948_Donora_smog | fluorine |
| gptkb:1948_Donora_smog | gptkb:aerosol |
| gptkb:1948_Donora_smog | sulfur dioxide |