<prompt> Translate the following text to EnglishKwa kusikitisha, saruji iliyotumiwa katika ujenzi wake ilikuwa na mchanga wa baharini, ambao ulisababisha vijiti vya chuma vya kuimarisha viangamie.  <response>: Unfortunately, the cement used for its construction contained sea sand, which caused the iron reinforcing rods to corrode. 