Premodifier: rock
Head noun: fragment

Same concepts
http://dbpedia.org/resource/Rock_fragment

Broader concepts

labelprovenanceconfidence
materialisap:589316900.381529
soilisap:3787501750.214517
sandstoneisap:1828858450.180873

Narrower concepts

labelprovenanceconfidence
quartzisap:1007138120.547477
gravelisap:1001551960.415756
pumiceisap:1051953280.398588
colosseumisap:4097271950.369369
boulderisap:485287490.354597
sandisap:4568608550.285012