<prompt> Translate the following text to EnglishShughuli maalum zilizofanywa na vikundi vya kati zilitofautiana kidogo, hasa kwa sababu zilitegemea kwa kiwango tofauti kwa wasimamizi wa usalama na wasimamizi katika vitengo vya chini na vikundi vingine tofauti vya shirika, kama vile timu za uokoaji wa maafa au majibu ya dharura.  <response>: Specific activities performed by central groups differed somewhat, primarily because they relied to a varying extent on security managers and administrators in subordinate units and on other organizationally separate groups, such as disaster recovery or emergency response teams. 