Complex sentence: In April 2014, Smith announced that in 2014 the band would release', which would contain 14 of those unreleased songs from the 2007 recording sessions and a limited edition double album titled' which would contain all 26 unreleased songs.
Split into simpler sentences: In April 2014, Smith announced that the band would release an album called'later that year, which would contain 14 of the unreleased songs from the 2007 recording sessions. As well, a limited edition double album titled' was also mooted, which would contain all 26 unreleased songs.