Complex sentence: In May 2013, Turunen announced the title of her 4th solo album, "Colours in the Dark", in which was released on August 30--on May 31 the song "Never Enough" was released as a teaser.
Split into simpler sentences: In May 2013, Turunen announced the title of her 4th solo album, "Colours in the Dark", in which was released on 30 August. On 31 May the song "Never Enough" was released as a teaser.