CREATE TABLE "series_2" (
  "date" text,
  "episode" real,
  "performer_1" text,
  "performer_2" text,
  "performer_3" text,
  "performer_4" text
);

Question: Performer 3 of paul merton, and a Performer 4 of sandi toksvig is which performer 1?
SQL: SELECT "performer_1" FROM "series_2" WHERE "performer_3"='paul merton' AND "performer_4"='sandi toksvig';

Question: Episode of 16 involves which performer 1?
SQL: SELECT "performer_1" FROM "series_2" WHERE "episode"=16;

Question: Performer 2 of compilation 1 had what performer 1?
SQL: SELECT "performer_1" FROM "series_2" WHERE "performer_2"='compilation 1';