Question: "How Long Will I Love You?", is a song by folk-rock band The Waterboys, Ellie Goulding's version is included on the soundtrack to the film "About Time", released in which year?

Context paragraphs:
On My Mind (Ellie Goulding song): "On My Mind" is a song by English singer Ellie Goulding from her third studio album "Delirium" (2015).  It was released as the album's lead single on 17 September 2015.  It was written by Goulding, Max Martin, Savan Kotecha and Ilya Salmanzadeh.  "On My Mind" is an electropop and R&B song whose instrumentation consists of scratchy guitars, trap drums, slapped beats and sharp, syncopated electronica.  Lyrically, "On My Mind" talks about a one-night stand with someone the protagonist shouldn't be with, having a dichotomy between heart and head.  Though firmly denied by Goulding, many critics considered it an answer song to Ed Sheeran's "Don't".

List of songs recorded by Ellie Goulding: English singer and songwriter Ellie Goulding has recorded songs for three studio albums and guest features.  After signing a contract with record label Polydor Records in July 2009, Goulding began to work on her debut studio album, "Lights", which was ultimately released in February 2010.  The first single released from the album was "Under the Sheets", which Goulding wrote in collaboration with Starsmith.  Starsmith co-wrote four other songs and served as the album's primary producer.  Goulding also collaborated with Jonny Lattimer on the singles "Starry Eyed" and "The Writer", and shared writing credits with Fraser T Smith on "Your Biggest Mistake".  In November 2010, the singer re-released "Lights" as "Bright Lights", which included the standard version of the album and several new songs.  She collaborated with Richard Stannard and Ash Howes on "Lights" and recorded a cover version of Elton John's "Your Song".  At this time, Goulding also contributed guest vocals on the song "Wonderman" for Tinie Tempah's debut studio album "Disc-Overy" (2010).

How Long Will I Love You?: "How Long Will I Love You?"  is a song by folk-rock band The Waterboys from their fifth studio album, "Room to Roam" (1990).  Written by Mike Scott, it was released as the album's lead single.  The song was subsequently covered by English singer Ellie Goulding and released as the second single from her album "Halcyon Days" (2013).  Goulding's version is included on the soundtrack to the 2013 film "About Time", which also features a different cover by Jon Boden, Sam Sweeney and Ben Coleman.

Lights (Ellie Goulding song): "Lights" is a song by English singer and songwriter Ellie Goulding from "Bright Lights" (2010), the reissue of her debut studio album, "Lights" (2010).  Written by Goulding, Richard Stannard and Ash Howes, the song was inspired by Goulding's childhood fear of the dark.  It was released on 13 March 2011 as the album's sixth single overall, and second from "Bright Lights".  Originally a bonus track on the UK and German iTunes edition of "Lights", the song was re-edited for inclusion on "Bright Lights" in late 2010, serving as the single version.

Love Me like You Do: "Love Me like You Do" is a song recorded by English singer Ellie Goulding for the "Fifty Shades of Grey" (2015).  The song was written by Savan Kotecha, Ilya Salmanzadeh, Tove Lo, Max Martin and Ali Payami; the latter two also produced it.  Goulding was selected to sing the track.  It was released on 7 January 2015 as the second single from the soundtrack.  The song was also included on Goulding's third studio album, "Delirium" (2015).

Outside (Calvin Harris song): "Outside" is a song by Scottish DJ and record producer Calvin Harris from his fourth studio album, "Motion" (2014).  The song features English singer Ellie Goulding and was released on 20 October 2014 as the fourth single from the album.  It marks the second collaboration between Harris and Goulding, following the single "I Need Your Love" (2013).  "Outside" is also included on the deluxe edition of Goulding's third studio album, "Delirium".

Flashlight (DJ Fresh song): "Flashlight" is a song by English singer and songwriter Ellie Goulding featuring production work from DJ Fresh, released as the fourth single from Fresh's forthcoming fourth studio album.  It was released on 28 September 2014 in the United Kingdom as a single, although it was previously out on Goulding's album from 2013.  The song features English singer and songwriter Ellie Goulding and also included as one of the tracks on Goulding's "Halcyon Days" (2013), the reissue of her second studio album, "Halcyon" (2012).  The Invisible Men assisted the artists in writing the song.

About Time (2013 film): About Time is a 2013 British romantic comedy-drama film about a young man with the special ability to time travel who tries to change his past in order to improve his future.  The film was written and directed by Richard Curtis, and stars Domhnall Gleeson, Rachel McAdams and Bill Nighy.  It was released in the United Kingdom on 4 September 2013.

I Need Your Love (Calvin Harris song): "I Need Your Love" is a song by Scottish producer and DJ Calvin Harris from his third studio album, "18 Months" (2012).  The song features English singer Ellie Goulding and was released on 12 April 2013 as the album's seventh single.  "I Need Your Love" is also included as a bonus track on Goulding's second studio album, "Halcyon" (2012).  The accompanying music video, directed by Emil Nava, depicts Harris and Goulding as a romantic couple on a trip to Miami.

Ellie Goulding: Elena Jane "Ellie" Goulding ( ; born 30 December 1986) is an English singer and songwriter.  Her career began when she met record producers Starsmith and Frankmusik, and she was later spotted by Jamie Lillywhite, who later became her manager and A&R.  After signing to Polydor Records in July 2009, Goulding released her debut extended play, "An Introduction to Ellie Goulding", later that year.

Supporting paragraphs: How Long Will I Love You? About Time (2013 film)
Answer: 2013