<prompt> Translate the following text to EnglishNilianza kuuliza, Ni mlango gani? Danieli alipochukua kipande cha ukuta wa matofali kilichokuwa na sura ya kawaida kabisa na kukifungua kando ili kufunua ukumbi mweusi uliokuwa nyuma yake.  <response>: What door? I started to ask, as Daniel took a perfectly ordinary looking chunk of brick wall and wrenched it aside to reveal a dark corridor beyond. 