<prompt> Translate the following text to EnglishAlessandro, aina ya tatu ya hoja dhidi ya upanuzi wa NATO inahusu athari zake kwa nchi za Ulaya Mashariki ambazo hazikubaliwa katika klabu hiyo.  <response>: Alesser, third category of arguments against NATO expansion concerns its effect on Eastern European countries that are not admitted to the club. 