Random triples
| Subject | Object |
|---|---|
| gptkb:Donora_Smog | sulfur dioxide |
| gptkb:Donora_Smog | aerosol |
| gptkb:Meuse_Valley_fog_of_1930 | sulfur dioxide |
| gptkb:Meuse_Valley_fog_of_1930 | aerosol |
| gptkb:Donora_Smog | metal dust |
| gptkb:Hamilton_Harbour_Area_of_Concern | heavy metals |
| gptkb:Hamilton_Harbour_Area_of_Concern | gptkb:phosphorus |
| gptkb:Donora_Smog | fluorine |
| gptkb:Hamilton_Harbour_Area_of_Concern | PCBs |
| gptkb:Hamilton_Harbour_Area_of_Concern | PAHs |
| gptkb:Meuse_Valley_fog_of_1930 | fluorine compounds |