Complex sentence: Writers join battle to create boy band's next hits, according to the article, Simon Cowell has challenged music's "most successful" songwriters to compete for space on One Direction's second album, after the global success of their debut album.
Split into simpler sentences: Writers join battle to create boy band's next hits. According to the article, Simon Cowell has challenged music's "most successful" songwriters to compete for space on One Direction's second album, after the global success of their debut album.