<prompt> Translate the following text to SwahiliArchaeologists have located some 7,000 of these nuraghi structures around the island, most of them flattened cone towers believed to be parts of fortified citadels.  <response>: Wataalamu wa vitu vya kale wamegundua kwamba kuna majengo 7,000 ya aina hiyo ya nuraghi katika kisiwa hicho, na wengi wao ni minara ya mviringo iliyojengwa kwa umbo la mviringo. 