"1990Z"^^ . . "1973-04-05Z"^^ . . "Derek Kerswill"@en . . . . . . . . . . "Kerswill, Derek"@en . "1973Z"^^ . "Derek M. Kerswill"@en . . . . . . . . . . "non_vocal_instrumentalist" . . "Derek Kerswill (born April 5, in Wilmington, DE) is an American musician best known for his drumming in the bands Unearth, Seemless, Kingdom of Sorrow, and multiple fill-ins/studio projects."@en . . . . . . "American musician" .