CREATE TABLE "radio" (
  "actor" text,
  "character" text,
  "soap_opera" text,
  "years" text,
  "duration" text
);

Question: What's the duration of the Archers with Norman Painting as an actor?
SQL: SELECT "duration" FROM "radio" WHERE "soap_opera"='the archers' AND "actor"='norman painting';

Question: What's the duration of the Archers with Pauline Seville acting?
SQL: SELECT "duration" FROM "radio" WHERE "soap_opera"='the archers' AND "actor"='pauline seville';

Question: Who's the actor for the Archers having a character of Martha Woodford?
SQL: SELECT "actor" FROM "radio" WHERE "soap_opera"='the archers' AND "character"='martha woodford';

Question: Who's the character when Margot Boyd was acting?
SQL: SELECT "character" FROM "radio" WHERE "actor"='margot boyd';