Complex sentence: In an interview with Simon Cowell, he revealed that one of the songs for the album will be titled "18", which is written by Ed Sheeran, who also wrote "Little Things" and "Moments" for the group.
Split into simpler sentences: In an interview with Simon Cowell, it was revealed that one of the songs for the album will be titled "18". The song was written by Ed Sheeran, who also wrote "Little Things" and "Moments" for the group.