What is the district of the city with the MAX(number of houses whose instance of is district of the city?
select ?ent where { ?ent wdt:/instance of/ wd:/self-governing city part in the Czech Republic/ . ?ent wdt:/number of houses/ ?obj . ?ent wdt:/instance of/ wd:/self-governing city part in the Czech Republic/ } ORDER BY DESC(?obj)LIMIT 5 