Question: What's the duration of The Archers with Norman Painting as an actor?
SQL: SELECT "Duration" FROM "2-18772558-15" 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 "2-18772558-15" 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 "2-18772558-15" WHERE "Soap Opera" = 'The Archers' AND "Character" = 'Martha Woodford';

Question: Who's the character when Margot Boyd was acting?
SQL: SELECT "Character" FROM "2-18772558-15" WHERE "Actor" = 'Margot Boyd';