If the distribution mechanism is windows nt 4.0 option pack Microsoft office 97 and the features is service release, what is the version?
CREATE TABLE "table1_2263152_1" (
  "version" text,
  "release_date" text,
  "distribution_mechanism" text,
  "features" text,
  "security_issues" text
);
SELECT "version" FROM "table1_2263152_1" WHERE "features"='Service release' AND "distribution_mechanism"='Windows NT 4.0 Option Pack Microsoft Office 97';