What is {safety classification and labelling} of {nitrogen trifluoride} that is {NFPA Special} is {OX} ?
Is OX the safety classification and labelling of nitrogen trifluoride for NFPA Special?
SELECT ?obj WHERE { wd:Q413835 p:P4952 ?s . ?s ps:P4952 ?obj . ?s pq:P877 ?x filter(contains(?x,'OX')) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q413835> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P4952> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P877> <OX>
} 

What is the safety classification and labelling of nitrogen trifluoride for NFPA Special?