Random triples
| Subject | Object |
|---|---|
| gptkb:Rock_Art_of_the_Mediterranean_Basin_on_the_Iberian_Peninsula | black pigment |
| gptkb:Rock_Art_of_the_Mediterranean_Basin_on_the_Iberian_Peninsula | gptkb:engraver |
| gptkb:Rock_Art_of_the_Mediterranean_Basin_on_the_Iberian_Peninsula | red ochre |
| gptkb:Zuojiang_Huashan_Rock_Art | natural mineral pigments |