What is the {star} with the {MAX(color index)} whose {topic's main category} is {Category:Arcturus}  ?
In the Arcturus star category, which star has the highest color index?
Which star classified in the Arcturus category has the highest color index?
SELECT ?i WHERE { ?i property:topic's_main_category resource:Category:Arcturus . ?i property:color_index ?p . ?i rdf:type ontology:star }
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q523>.

?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/P1458>.
?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/P910> .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q15099767> .

}
ORDER BY DESC(?obj1)
LIMIT 5
select ?ent where { ?ent wdt:P31 wd:Q523 . ?ent wdt:P1458 ?obj . ?ent wdt:P910 wd:Q15099767 } ORDER BY DESC(?obj)LIMIT 5 
Arcturus