<prompt> Translate the following text to EnglishDaniel Hungerford, mwanasayansi wa utafiti wa Richmond-Kotelchuck, alionyesha kuwa mabadiliko ya kitamaduni yanatokana na juhudi zinazotumika kwa vipengele vyote vitatu vya mfano: mapenzi ya kisiasa, mkakati wa kijamii, na msingi wa maarifa.  <response>: Daniel Hungerford observed that the Richmond-Kotelchuck model suggests that changes in practice result from effort applied to all three elements of the model-political will, social strategy, and knowledge base. 