Name a space observatory that starts with letter J
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q148578 . ?sbj wdt:P3712 wd:Q180046 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'j')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
space observatory: Q148578 space exploration: Q180046