What is {safety classification and labelling} of {hydrogen sulfide} that is {NFPA Fire} is {4} ?
According to the NFPA Fire regulations, what are the four safety classification labels for hydrogen sulfide?
What are the 4 safety classification labels for hydrogen sulfide under the NFPA Fire regulations?
SELECT ?t WHERE { ?c property:safety_classification_and_labelling ?t . ?c property:NFPA_Fire ?z . resource:hydrogen_sulfide property:safety_classification_and_labelling ?c . FILTER ( CONTAINS ( ?z , '4' ) ) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q170591> .
?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/P994> <4>
} 

SELECT ?obj WHERE { wd:Q170591 p:P4952 ?s . ?s ps:P4952 ?obj . ?s pq:P994 ?x filter(contains(?x , '4')) }