Original sentence: Kasmira was a kingdom   identified as the Kashmir Valley along the Jhelum River of the modern Jammu and Kashmir state.The Naga are related to Kashyapa; according to the Puranas, the Naga race originated from Kashyapa
Edited sentence: A sect in Kashmir speaks of Duryodhana with great reverence.It is identified as the Kashmir Valley along the Jhelum River of the modern Jammu and Kashmir state.Kasmira was a kingdom grouped under the northern kingdoms according to the epic Mahabharata.The Naga race is related to Kashyapa; according to the Puranas, the Naga race originated from Kashyapa