 إذًا هؤلاء الطلاب هم الذين توجهوا إلى زملائهم وأقنعوهم بالانضمام  و  جميعهم فوق سن الثمانية عشرة  وهذا مهم. 
so those students are the ones who went to their colleagues and persuaded them to join and they all are above eighteen and this is important.  