<prompt> Fingqa isihloko: CNN Umhlaba ubheke lokho okungase kube impumelelo yomlando kwezokuxhumana kwamazwe omhlaba - noma, kalula nje, ukwehluleka okudumazayo - njengoba abaxoxi behlala phansi kuleli sonto edolobheni elithule elisogwini lolwandle iLausanne, eSwitzerland, ukuze baqede isivumelwano sezikhungo zenuzi ne-Iran ngaphambi kuka-March 31. Nazi ezinye zezinto ezibalulekile okudingeka uzazi njengoba isikhathi esibekiwe esilandelayo sisondela ezingxoxweni zenuzi zase-Iran: 1. Izinkomo Umgwaqo oya eLausanne ube mude. Lo mjikelezo wakamuva wezingxoxo uyingxenye yenqubo ebilokhu iqhubekela phambili iminyaka emibili, ngezindlela zombusazwe zomphakathi nezangasese. Ngo-2013, ukungezwani phakathi kwemibuso yomhlaba ne-Iran kwaqala ukuncibilika kancane ngemva kokukhethwa kukaMengameli wase-Iran uHasan Rouhani, owenza izinguquko, futhi wathembisa ukuqeda isisindo esilimazayo sezijeziso zamazwe ngamazwe emnothweni wase-Iran. NgoNovemba walowo nyaka, izikhulu ezivela emazweni ayisihlanu angamalungu angunaphakade eMkhandlu Wezokuphepha we-UN - i-United States, i-United Kingdom, iFrance, iRussia neChina - kanye neJalimane, zaqala izingxoxo zenuzi nezikhulu zase-Iran eSwitzerland futhi zasayina lokho okwaziwa ngokuthi yi-Geneva Agreement noma i-Joint Plan of Action, enikeza ukukhululeka okulinganiselwe ekubekelweni kwe-Iran izigwebo uma nje lelo zwe lingahlehlisa izici ezithile zohlelo lwalo lwenuzi. Lesi sivumelwano sasimenyezelwa njengesinyathelo sesikhashana esiya esivumelwaneni esikhudlwana, esibanzi, esasizonciphisa kakhulu ingcindezi yezomnotho e-Iran futhi sinikeze amandla omhlaba ayisithupha - abizwa ngokuhlanganyela ngokuthi yi-P5 1 - iziqinisekiso ezithile zokuthi uhlelo lwe-nuclear lwase-Iran lunokuthula ngokwemvelo, njengoba lusho. Kuye kwaba nemijikelezo eminingana yezingxoxo kusukela kwafinyelelwa kuHlelo Lokusebenza Oluhlanganyelwe emzamweni wokuthola leso sivumelwano esibanzi. Kodwa lesi sivumelwano sesikhashana siye sandiswa kabili ngenxa yokwehluleka kwezinhlangothi zombili ukuhlangabezana nesikhathi esibekiwe sokwenza isivumelwano sokugcina. 2. Izingelosi Asikho isiqinisekiso sokuthi bazokwenza isivumelwano. Nakuba zombili izinhlangothi zingazuza esivumelwaneni esingase sibe khona, zine imigqa ebomvu ethile ezingazimisele ukuyinqamula - isihluthulelo...  <response>: Isivumelwano sesikhashana esiphakathi kwamandla omhlaba ayisithupha ne-Iran kusukela ngo-2013 selandiswe kabili. Amaqembu afuna isivumelwano esiyisisekelo - noma izimiso eziyinhloko zesivumelwano sokugcina - ngesonto elizayo. Amazwe ayisikhombisa ase etafuleni lezokuxoxisana, kodwa amanye anjengoIsrayeli alandela ngaphandle. 