<prompt> Translate the following text to SwahiliAlso within the sprawling grounds of the park are the official residence of the president of the Republic, which dates from 1751 guided tours from the Visitor Centre Saturday at 9:40am and 4:20pm, and the US ambassadors residence, an 18th-century house which was formerly the official residence of the Viceroys chief secretary not open to the public.  <response>: Pia ndani ya uwanja wa bustani ni makazi rasmi ya rais wa Jamhuri, ambayo tarehe kutoka 1751 maonyesho ya ziara kutoka Kituo cha Wageni Jumamosi saa 9:40 asubuhi na 4:20 jioni, na makazi ya balozi wa Marekani, nyumba ya karne ya 18 ambayo ilikuwa zamani makazi rasmi ya katibu mkuu wa Viceroy si wazi kwa umma. 