Question: Is OX the safety classification and labelling of nitrogen trifluoride for NFPA Special?
Paraphrase: What is the safety classification and labelling of nitrogen trifluoride for NFPA Special?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q413835 p:P4952 ?s . ?s ps:P4952 ?obj . ?s pq:P877 ?x filter(contains(?x , 'OX')) }