The cities in question:
Seiveirodonetsk, Kreminna, Lysychansk, Melitopol, Mariupol, Tokmak, Donetsk, or Svatove

This market will resolve with the same result, at the same time as its counterpart on Insight Prediction:
https://insightprediction.com/m/201557/will-ukraine-retake-control-of-seiveirodonetsk-kreminna-lysychansk-melitopol-mariupol-tokmak-donetsk-or-svatove-by-september-15th

The Insight market should resolve as "Yes" if, at any point in time before September 15th, 2023, Ukraine retakes control of any of the following central points in any of these cities, according to maps provided by the Institute for the Study of War (ISW): the train station "Avtovokzal" in Seiveirodonetsk, the intersection of R66 and "Kosmonavta Titova Vulytsa" in Kreminna, any part of "Karl Marks street (Vulytsa)" in Lysychansk, "Donetsk (railroad) Station" in Donetsk, the central train station in Melitopol, Azovstal station in Mariupol, the train station "Verkniy Tokmak" in Tokmak, or Svatove train station in Svatove.