Complex sentence: It also appeared intermittently during the 2009 Working on a Dream Tour.It's performances in 2009 became substantially more frequent later in the tour as the band began to play Born To Run in its entirety at most shows.
Split into simpler sentences: It also appeared intermittently during the 2009 Working on a Dream Tour. Its performances in 2009 became substantially more frequent later in the tour as the band began to play Born To Run in its entirety at most shows.