Name the country with the most total exports, where Viktor Zubkov was Prime Minister?
select ?ent where { ?ent wdt:P31 wd:Q3624078 . ?ent wdt:P2135 ?obj . ?ent wdt:P6 wd:Q147425 } ORDER BY DESC(?obj)LIMIT 5 
sovereign state: Q3624078 viktor zubkov: Q147425