Complex sentence: The agglomerate consists of Kathmandu Metropolitan City at its core and its sister cities of Patan, Kirtipur, Thimi, Bhaktapur as well as recently recognized urban areas of Shankhapur, Karyabinayak and Champapur.
Split into simpler sentences: The agglomerate consists of Kathmandu Metropolitan City at its core, and its sister cities Patan, Kirtipur, Thimi, and Bhaktapur. It also includes the recently recognized urban areas of Shankhapur, Karyabinayak, and Champapur.