<prompt> Translate the following text to EnglishKwa kawaida kulikuwa na mtafiti mmoja tu, na data zilijumuisha maelezo, uchunguzi, hisia, mahojiano yasiyo na muundo, na vifaa vilivyopo vilivyokusanywa kwenye tovuti ambayo yalipangwa kwa njia ya kawaida na isiyo rasmi.  <response>: There was usually only one research investigator, and the data consisted of descriptions, observations, impressions, unstructured interviews, and existing materials gathered at the site that were organized intuitively and informally. 