What is the {binary star} with the {MIN(color index)} whose {child astronomical body} is {Aldebaran b}  ?
Which binary star has the child astronomical body Aldebaran b and the lowest color index.
select ?ent where { ?ent wdt:P31 wd:Q50053 . ?ent wdt:P1458 ?obj . ?ent wdt:P398 wd:Q21067503. } ORDER BY ASC(?obj)LIMIT 5 
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q50053>.

?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/P398> .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q21067503> .

}
ORDER BY ASC(?obj1)
LIMIT 5
Which binary star has the lowest color index and is the parent of Aldebran b?