수능특강에서의 질문이요..

known as the Golden City , JAISALMER(주어), a former caravan center on the route to the Khyber Pass, rises (동사)form a sea from a sea of sand, its 30-foot-high walls and medieval sandstone fort sheltering carved spires and palaces that soar into the sapphire sky.
이구문에서의 주어와 동사..는 알겠는데..

뒤에 its .구문부터는 문장 성분이 어떻게 되는건지 궁금해서요~~