Complex sentence: The band was touring in Italy three days before their performance at the 2012 MTV Video Music Awards when the front-man Billie Joe Armstrong was admitted to hospital as he had suffered from dehydration and influenza.
Split into simpler sentences: The band was touring in Italy three days prior to their performance at the 2012 MTV Video Music Awards. The front-man Billie Joe Armstrong was admitted to hospital due to dehydration and influenza.