<prompt> Translate the following text to EnglishHata hivyo, uvumi unaoendelea unaonyesha kwamba bidhaa hizo zilitengenezwa na mashirika ya vyakula vya haraka kama sehemu ya kampeni ya matangazo ya biashara.  <response>: The most convincing rumour says that they were manufactured by some Fast Food chain as part of an incredibly elabourate advertising campaign. 