Name the G-type main-sequence star in our solar system with the smallest angular diameter ?
select ?ent where { ?ent wdt:P31 wd:Q5864 . ?ent wdt:P5348 ?obj . ?ent wdt:P397 wd:Q544. } ORDER BY ASC(?obj)LIMIT 5 
g-type main-sequence star: Q5864 solar system: Q544