What is the {flammable gas} with the {MAX(IDLH)} whose {found in taxon} is {Homo sapiens}  ?
Name the combustible gas that has the highest IDLH existing in humans
What combustible gas with the highest IDLH exists in humans?
SELECT ?e WHERE { ?e property:immediately_dangerous_to_life_or_health ?t . ?e property:found_in_taxon resource:Homo_sapiens . ?e rdf:type ontology:Q21073026 }
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q21073026>.

?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/P2129>.
?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/P703> .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q15978631> .

}
ORDER BY DESC(?obj1)
LIMIT 5
select ?ent where { ?ent wdt:P31 wd:Q21073026 . ?ent wdt:P2129 ?obj . ?ent wdt:P703 wd:Q15978631 } ORDER BY DESC(?obj)LIMIT 5 