Complex sentence: Each fifteen-minute episode was transmitted at lunchtime, Monday to Friday, and introduced by its signature tune, the second movement of Hamilton Harty's "An Irish Symphony", sub-titled "The Fair Day".
Split into simpler sentences: Each fifteen-minute episode was transmitted at lunchtime, Monday to Friday. The programme's signature tune was the second movement of Hamilton Harty's "An Irish Symphony", sub-titled "The Fair Day".