"Mark Luther Steffens"@en . . "American soccer player and coach" . . . . . . . "1953-06-09Z"^^ . . . . . . . . . . . . . . "Mark Luther Steffens (born June 9, 1953 in Huntington) is an American soccer coach who is currently head coach of the Pittsburgh Riverhounds in the USL Pro."@en . . . . . . "Steffens, Mark"@en . "Mark Steffens"@en . . "1953Z"^^ .