Which Date has an Opposing Pitcher of jack morris, and an Inning of 4th?
CREATE TABLE "mc_gwire_s_rookie_record_49_home_runs" (
  "home_run" real,
  "game" real,
  "date" text,
  "inning" text,
  "location" text,
  "opposing_pitcher" text,
  "team" text
);
SELECT "date" FROM "mc_gwire_s_rookie_record_49_home_runs" WHERE "opposing_pitcher"='jack morris' AND "inning"='4th';