"Dennis Chalker"@en . . "1971Z"^^ . "Dick Marcinko"@en . . "Dennis Chalker is a retired Navy SEAL, inventor and author who has written six books about the United States Navy SEALs."@en . . "Navy SEAL,Author" . . "1954Z"^^ . "Denny, Snake"@en . "United States of America" . "2001Z"^^ . "1954-07-28Z"^^ . "Richard Marcinko"@en . .