Question: What former member of the country group Uncle Tupelo contributed to the album Down in a Mirror: A Second Tribute to Jandek?
Sentence (from "Down in a Mirror: A Second Tribute to Jandek"): Some of the artists are members of the Summersteps roster or fans forming one-time combos to participate on the album, but the album also features contributions from Wilco's Jeff Tweedy, Six Organs of Admittance (reportedly a favorite modern act of Jandek's, according to the "unauthorized" "Texas Monthly" interview), The Mountain Goats, Kawabata Makoto of Acid Mothers Temple, Lewis & Clarke and Okkervil River.
Relevant evidence: Yes