Original sentence: Laos lies mostly within the Mekong basin, west of the divide, although most of Houaphan Province and a portion of Xiangkhoang Province lie east of the divide
Edited sentence: Laos lies mostly within the Mekong basin, west of the divide, although most of Houaphan Province and a portion of Xiangkhoang Province (where the famous Plain of Jars is located) lie east of the divide