What is the {Class IB flammable liquid} with the {MIN(vapor pressure)} whose {instance of} is {ester}  ?
What Class IB flammable liquid ester possesses the vapor pressure that is lowest?
Which Class IB flammable liquid ester has the lowest vapor pressure?
SELECT ?o WHERE { ?o rdf:type ontology:ester . ?o rdf:type ontology:Class_IB_flammable_liquid . ?o property:vapor_pressure ?g }
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q21009055>.

?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/P2119>.
?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/Q101487> .

}
ORDER BY ASC(?obj1)
LIMIT 5
select ?ent where { ?ent wdt:P31 wd:Q21009055 . ?ent wdt:P2119 ?obj . ?ent wdt:P31 wd:Q101487} ORDER BY ASC(?obj)LIMIT 5 
ethyl acetate butyl acetate ethyl acetate propyl acetate methyl methacrylate