Question: What is the cosmic microwave background experiment with the lowest maximum wavelength of sensitivity whose operator is National Science Foundation ?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q33093130 . ?ent wdt:P3737 ?obj . ?ent wdt:P137 wd:Q304878} ORDER BY ASC(?obj)LIMIT 5