<prompt> Translate the following text to SwahiliHe demanded that the British merchants in Canton surrender their opium stores, and to back up his ultimatum he laid siege to the traders, who, after six tense weeks, surrendered over 20,000 chests of opium.  <response>: Aliwaomba wafanyabiashara wa Uingereza katika Canton kujisalimisha maduka yao ya opiamu, na kuunga mkono ultimatum yake aliweka kuzingirwa kwa wafanyabiashara, ambao, baada ya wiki sita za mkazo, walijisalimisha zaidi ya masanduku 20,000 ya opiamu. 