query: SELECT DISTINCT ?item ?taxonName ?roleLabel {
    BIND(wd:Q9482 AS ?higherParent) # Sciuridae
    ?item (wdt:P171)* ?higherParent .  
    ?item p:P225 ?statement .
    ?statement ps:P225 ?taxonName .
    ?statement prov:wasDerivedFrom ?refnode .
    OPTIONAL {?refnode pr:P6184 ?role}. 
    FILTER(BOUND(?role))
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE]". }
  }
  ORDER BY ASC(?taxonName)