What is the {chemical compound} with the {MIN(median lethal dose)} whose {safety classification and labelling} is {NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response}  ?
What chemical compound with the lowest median lethal dose has protection classification and labelling of NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response?
What chemical compound with the lowest median lethal dose has safety classification and labelling of NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response?
SELECT ?x WHERE { ?x rdf:type ontology:chemical_compound . ?x property:safety_classification_and_labelling resource:NFPA_704:_Standard_System_for_the_Identification_of_the_Hazards_of_Materials_for_Emergency_Response . . ?x property:median_lethal_dose_(LD50) ?c }
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q11173>.

?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?ent .
?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2240>.
?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj1.

?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?ent .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P4952> .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q51139288> .

}
ORDER BY ASC(?obj1)
LIMIT 5
select ?ent where { ?ent wdt:P31 wd:Q11173 . ?ent wdt:P2240 ?obj . ?ent wdt:P4952 wd:Q51139288. } ORDER BY ASC(?obj)LIMIT 5 
acetone cyanohydrin arsenic trihydride arsenic trihydride acrylic acid arsenic trihydride