Original sentence: He has held ministerial posts in several previous governments, served as speaker of the Sahrawi National Council (the exile parliament) in 1999-2003, and before that as wali, or mayor, of the Smara refugee camp in Tindouf.South African-Saharan relations
Edited sentence: He has held ministerial posts in several previous governments, served as speaker of the Sahrawi National Council (the exile parliament) in 1999–2003, and before that as wali, or mayor, of the Smara refugee camp in Tindouf.South African–Saharan relations