Question: Which space agency whose  website account on Foursquare Labs, Inc. and which that starts with the letter a
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q17505024 . ?sbj wdt:P553 wd:Q51709 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'a')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25