What is the {nuclear isomer} with the {MAX(neutron number)} whose {instance of} is {isotope of lead}  ?
What is the nuclear isomer with the best neutron range whose occasion of is isotope of lead?
What is the nuclear isomer with the highest neutron number whose instance of is isotope of lead?
SELECT ?n WHERE { ?n property:neutron_number ?j . ?n rdf:type ontology:isotope_of_lead . ?n rdf:type ontology:nuclear_isomer }
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q846110>.

?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/P1148>.
?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/Q1372384> .

}
ORDER BY DESC(?obj1)
LIMIT 5
select ?ent where { ?ent wdt:P31 wd:Q846110 . ?ent wdt:P1148 ?obj . ?ent wdt:P31 wd:Q1372384 } ORDER BY DESC(?obj)LIMIT 5 
lead-212m lead-210m lead-208m lead-207m lead-206m1