Question: Which is the measured physical quantity for luminous flux?
SPARQL (Wikidata): select distinct ?answer where { ?answer wdt:P111 wd:Q107780}
Answer: lumen, attolumen, zettalumen, decalumen, microlumen, kilolumen, millilumen, megalumen, teralumen, centilumen, picolumen, nanolumen, hectolumen, femtolumen, zeptolumen, petalumen, gigalumen, yottalumen, yoctolumen, exalumen, decilumen