Original sentence: Hitchin was previously part of Hertfordshire North and Harpenden came under the St Albans constituency.The constituency was created prior to the 1997 General Election.The village of Wheathampstead also in this constituency was previously part of Welwyn Hatfield
Edited sentence: Prior to 1997 Hitchin was previously included in the  North Hertfordshire constituency and Harpenden in the St Albans constituency, while the village of Wheathampstead was previously part of the Welwyn Hatfield constituency.The constituency was created in 1997 from parts of several former Hertfordshire seats