What what is Radionavigation-satellite service manifestation of by satellite navigation system nd which that starts with 'g'
SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q20181002 . ?sbj wdt:P1557 wd:Q179435 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'g')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
radionavigation-satellite service: Q20181002 satellite navigation system: Q179435