Complex sentence: The Uptown Theater remained as the anchor of the building, but attendance tapered off over the years, and by the 1980s closure was inevitable, although when the Uptown closed in 1989, it had survived longer than any other neighborhood theater in Louisville except the Vogue.
Split into simpler sentences: The Uptown Theater remained as the anchor of the building, but attendance tapered off over the years, and by the 1980s closure was inevitable. When the Uptown closed in 1989, it had survived longer than any other neighborhood theater in Louisville except the Vogue.