Question: Loudon Wainwright III is related to which American independent folk singer?
Sentence (from "Songs in the Dark (album)"): The album, released on November 13, 2015, includes lullabies that their mothers Kate McGarrigle and Suzzy Roche sang to them as children, plus songs by Woody Guthrie, Jimmie Rogers, and their father Loudon Wainwright III.
Relevant evidence: No