What is the type of quantum particle with the highest gyromagnetic ratio whose instance of is isotope of neutronium ?
select ?ent where { ?ent wdt:P31 wd:Q22675015 . ?ent wdt:P2222 ?obj . ?ent wdt:P31 wd:Q12525553 } ORDER BY DESC(?obj)LIMIT 5 
type of quantum particle: Q22675015 isotope of neutronium: Q12525553