What character was the version 5.1 and had a Greek capital letter Archaic Sampi?
CREATE TABLE "computer_encoding" (
  "character" text,
  "code" text,
  "name" text,
  "version" real,
  "year" real
);
SELECT "character" FROM "computer_encoding" WHERE "version"=5.1 AND "name"='greek capital letter archaic sampi';