Question: What is the correct safety classification of iron(III) oxide as per the NFPA 704:  Standard System for the Identification of Hazards of Materials for Emergency Response?
Paraphrase: What is the correct classification of iron oxide?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q419170 p:P4952 ?s . ?s ps:P4952 wd:Q51139288 . ?s pq:P995 ?value}