What is the {Class IA flammable liquid} with the {MIN(ceiling exposure limit)} whose {instance of} is {occupational carcinogen}  ?
What is the IA class flammable liquid with the lowest ceiling explosure whose instance of is occupational carcinogen?
which class IA flammable liquid with the lowest ceiling exposure whose instance of is occupational carcinogen?
SELECT ?q WHERE { ?q rdf:type ontology:occupational_carcinogen . ?q rdf:type ontology:Class_IA_flammable_liquid . ?q property:ceiling_exposure_limit ?b }
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q21009053>.

?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/P2405>.
?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/P31> .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q21074597> .

}
ORDER BY ASC(?obj1)
LIMIT 5
select ?ent where { ?ent wdt:P31 wd:Q21009053 . ?ent wdt:P2405 ?obj . ?ent wdt:P31 wd:Q21074597} ORDER BY ASC(?obj)LIMIT 5 
acetaldehyde 1,1-dichloroethene propylene oxide