<prompt> unaweza kugeuza matini haya ya swahilikwa kiingereza?katika toleo la awali la solar decathlon, ambayo ilifanyika mnamo novemba 2018, huko dubai, efden, ngo ambayo itawakilisha romania wakati wa toleo lijalo, iliunda mradi wa nyumba ya jua ya saini ya efden, uliofanywa na timu iliyoundwa hasa ya wanafunzi.  <response>: at the previous edition of the solar decathlon, which took place in november 2018, in dubai, efden, the ngo which will be representing romania during the upcoming edition, designed the efden signature solar house project, carried out by a team made up mainly of students. 