<prompt> tafsiri zifuatazo kutoka kwa swahili hadi kiingereza.baada ya zaidi ya mwaka wa mazungumzo, hatimaye canada na marekani wameafikiana kutia saini kwenye mkataba mpya wa biashara, aeumc, ambao pia unaihusisha mexico.  <response>: after more than a year of negotiations, canada and the us still trying to resolve differences over north american free trade agreement, which also includes mexico 