Head noun: enrichment
Postmodifier: of uranium

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

Broader concepts

labelprovenanceconfidence
nuclear activityisap:2852494780.603150
nuclear programisap:2184403420.433687
stepisap:5048297030.260813
threatisap:2569587550.159774

Narrower concepts

labelprovenanceconfidence
levelisap:2582607670.274763