Complex sentence: The Dutch Residence comprises Tanjung Pinang, Lingga, Riau and Indragiri, while the Tudjuh Archipelago was being administered separately as "Afdeeling Poelau-Toedjoeh" (Dutch: The District of Pulau Tudjuh).
Split into simpler sentences: The Dutch Residence comprises Tanjung Pinang, Lingga, Riau and Indragiri. The Tudjuh Archipelago was then being administered seperately as "Afdeeling Poelau-Toedjoeh" (Dutch: The District of Pulau Tudjuh).