<prompt> Translate the following text to SwahiliI phoned Michael J. Thun, one of the studys authors and an epidemiologist with the American Cancer Society, and asked him whether a 20 percent mortality reduction is indeed small in the world of epidemiology.  <response>: Michael J. Thun, mwandishi wa utafiti huo na mtaalamu wa magonjwa ya kansa wa American Cancer Society, aliuliza ikiwa kupunguza vifo kwa asilimia 20 ni jambo dogo katika ulimwengu wa magonjwa ya kansa. 