<prompt> Translate the following text to SwahiliResearchers are performing placebo-controlled surgical trials in which they cut patients open and sew them back up without doing anything.  <response>: Watafiti wanafanya majaribio ya upasuaji ya kudhibitiwa na placebo ambapo wanawapasua wagonjwa na kuwafunga tena bila kufanya chochote. 