<prompt> Translate the following text to EnglishHata hivyo, ni vigumu kuelewa mabadiliko makubwa yaliyotokea katika bonde hilo katika karne ya 20 ambayo yalisababisha jiji linalojulikana leo kama Mji Mkuu wa Burudani Ulimwenguni.  <response>: It is harder still to understand the dramatic changes that would occur in the valley over the course of the 20th century, which created the city known today as the Entertainment Capital of the World. 