<prompt> tafsiri zifuatazo kutoka kwa swahili hadi kiingereza.walakini, miaka ya 20 iliyopita ilionyesha kuwa miji inahitaji msaada zaidi ili kukubali kikamilifu jukumu la lazima ambalo wanapaswa kuchukua.  <response>: yet, the past 20 years have demonstrated that cities need more help to fully embrace the leading role they must play. 