<prompt> Translate the following text to EnglishLawrence aliendelea kusema: Ninaamini kwamba kumekuwa na visa ambapo athari ya dawa ya kulevya, iliyotolewa kwa muda fulani, imesababisha kifo.  <response>: I believe, continued Lawrence, that there have been cases where the cumulative effect of a drug, administered for some time, has ended by causing death. 