Question: Which binary star has the child astronomical body Aldebaran b and the lowest color index.
Paraphrase: Which binary star has the lowest color index and is the parent of Aldebran b?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q50053 . ?ent wdt:P1458 ?obj . ?ent wdt:P398 wd:Q21067503. } ORDER BY ASC(?obj)LIMIT 5