<prompt> Translate the following text to SwahiliDuring the Sixth Crusade 1228 1229, the Holy Roman Emperor Frederick II managed to secure Jerusalem for the Christians by negotiation.  <response>: Wakati wa Vita vya sita vya Msalaba 1228-1229, Mfalme Frederick wa Roma Takatifu aliweza kuwalinda Wakristo wa Yerusalemu kwa njia ya mazungumzo. 