CREATE TABLE "2004" (
  "date" text,
  "cover_model" text,
  "centerfold_model" text,
  "interview_subject" text,
  "20_questions" text
);

Question: Which Cover model has a 20 Questions of christina applegate?
SQL: SELECT "cover_model" FROM "2004" WHERE "20_questions"='christina applegate';

Question: When has a Centerfold model of krista kelly?
SQL: SELECT "date" FROM "2004" WHERE "centerfold_model"='krista kelly';

Question: Which 20 Questions has a Cover model of rena mero , torrie wilson (two alternative covers)?
SQL: SELECT "20_questions" FROM "2004" WHERE "cover_model"='rena mero , torrie wilson (two alternative covers)';

Question: When Centerfold model is on 3-04?
SQL: SELECT "centerfold_model" FROM "2004" WHERE "date"='3-04';

Question: Which Cover model has a Centerfold model of scarlett keegan?
SQL: SELECT "cover_model" FROM "2004" WHERE "centerfold_model"='scarlett keegan';

Question: When has a Centerfold model of pilar lastra?
SQL: SELECT "date" FROM "2004" WHERE "centerfold_model"='pilar lastra';