what is the {NFPA Health} for {nitric acid} has {safety classification and labelling} as {NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response} ?
Refer to the NFPA Health subsection NFPA 704: Standard system for the identification of the hazards of materials for emergency response, and indicate the safety classification and labeling for Nitric Acid.
What is the safety classification and labeling for Nitric Acid through the NFPA Health subsection NFPA 704:Standard system for the identification of the hazards of materials for emergency response?
SELECT ?w WHERE { resource:nitric_acid property:safety_classification_and_labelling ?j . ?j property:NFPA_Health ?w . ?j property:safety_classification_and_labelling resource:NFPA_704:_Standard_System_for_the_Identification_of_the_Hazards_of_Materials_for_Emergency_Response }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q83320> .
?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> <http://wikidata.dbpedia.org/resource/Q51139288> .
?statement <http://www.wikidata.org/entity/P993> ?value. 
} 

SELECT ?value WHERE { wd:Q83320 p:P4952 ?s . ?s ps:P4952 wd:Q51139288 . ?s pq:P993 ?value}