Original sentence: The Wāli of Swat was the leader (Wāli) of the erstwhile State of Swat this state was incorporated into the North-West Frontier Province of Pakistan in 1969
Edited sentence: The Wāli of Swat was the leader (Wāli) of the erstwhile State of Swat.The post disappeared in 1969 when this state was incorporated into the North-West Frontier Province of Pakistan