What is the {Class IB flammable liquid} with the {MAX(combustion enthalpy)} whose {instance of} is {monohydric alcohol}  ?
which is the class IB flammable liquid with the highest combustion enthalpy whose instance of is monohydric alcohol?
select ?ent where { ?ent wdt:P31 wd:Q21009055 . ?ent wdt:P2117 ?obj . ?ent wdt:P31 wd:Q19790488 } ORDER BY DESC(?obj)LIMIT 5 
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/P2117>.
?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/Q19790488> .

}
ORDER BY DESC(?obj1)
LIMIT 5
What IB flammable liquid whose instance is monohydric alcohol has the highest combustion enthalpy?