What time in office does the U.S. Navy have?
CREATE TABLE "commanders_in_chief_commanders" (
  "name" text,
  "branch" text,
  "term_began" text,
  "term_ended" text,
  "time_in_office" text
);
SELECT "time_in_office" FROM "commanders_in_chief_commanders" WHERE "branch"='u.s. navy';