What is the quasar with the highest redshift whose discoverer or inventor is William Herschel?
select ?ent where { ?ent wdt:P31 wd:Q83373 . ?ent wdt:P1090 ?obj . ?ent wdt:P61 wd:Q14277 } ORDER BY DESC(?obj)LIMIT 5 
quasar: Q83373 william herschel: Q14277