Tom Service considers what makes a good song work - verse, chorus, a good tune and...? Is a pop song using fundamentally the same structure as an art song or lied? From the timeless pop of The Carpenters to the gigantic "song symphonies" of Gustav Mahler, Tom examines what you can do with a few verses, perhaps a chorus, and maybe a "middle eight". He's also joined by composer and pianist Richard Sisson to consider the genius of Robert Schumann's songcraft, and by producer Dan Carey who considers contrasting song structures by The Beach Boys and Frank Ocean.