Complex sentence: The first official single, "Wings", was released on 22 July 2013 and a second song, "All You Never Say", was sent to subscribers of Birdy's mailing list and posted on YouTube on 15 August 2013.
Split into simpler sentences: The first official single, "Wings", was released on 22 July 2013. A second song, "All You Never Say", was sent to subscribers of Birdy's mailing list and posted on YouTube on 15 August 2013.