When first woman eva is the comment what is the end -utc?
CREATE TABLE "spacewalks" (
  "spacecraft" text,
  "spacewalker" text,
  "start_utc" text,
  "end_utc" text,
  "duration" text,
  "comments" text
);
SELECT "end_utc" FROM "spacewalks" WHERE "comments"='First woman EVA';