Question: Who was the title track about from U2's album that Apple CEO Tim Cook marketed as "the largest album release of all time"?

Context articles: Siri Remote
The Miracle (Of Joey Ramone)
IPhone 6S
Songs of Innocence (U2 album)
Paul Deneve
Eddy Cue
IPhone 7
IPhone 8
IPhone X
Apple Watch

The Siri Remote is a remote control device released in tandem with the 4th Generation Apple TV at an Apple Keynote Address by CEO Tim Cook on October 26, 2015 by Apple Inc. The Remote is designed specifically to work with the always-on Siri capable Apple TV.
 The device is a successor of the original Apple Remote.
 It is also compatible with the Apple TV 4K.
"The Miracle (Of Joey Ramone)" is a song by Irish rock band U2.
 It is the opening track from their thirteenth studio album, "Songs of Innocence", and was released as its lead single.
 It was produced by Danger Mouse, Paul Epworth, and Ryan Tedder.
 It was first unveiled by the band at an Apple Inc. product launch event on 9 September 2014, coinciding with an announcement that "Songs of Innocence" would be released digitally to iTunes Store customers free of charge.
 The song's title refers to American musician Joey Ramone, lead singer of influential punk rock band, the Ramones.
iPhone 6S and iPhone 6S Plus (stylized and marketed as iPhone 6s and iPhone 6s Plus) are smartphones designed, developed and marketed by Apple Inc. They were announced on September 9, 2015, at the Bill Graham Civic Auditorium in San Francisco by Apple CEO Tim Cook, with pre-orders beginning September 12 and official release on September 25, 2015.
 The iPhone 6S and 6S Plus were succeeded by the iPhone 7 and iPhone 7 Plus in September 2016.
Songs of Innocence is the thirteenth studio album by Irish rock band U2.
 Released on 9 September 2014, it was produced by Danger Mouse, with additional production from Paul Epworth, Ryan Tedder, Declan Gaffney, and Flood.
 The album was announced at an Apple Inc. product launch event and released the same day to all iTunes Store customers at no cost.
 It was exclusive to iTunes, iTunes Radio, and Beats Music until 13 October 2014, when it received a physical release on Island and Interscope Records.
 The digital release made the record available to over 500 million iTunes customers, for what Apple CEO Tim Cook marketed as "the largest album release of all time".
Paul Deneve (born February 16, 1961) is a business leader with a background in fashion and technology.
 On September 16, 2013, he became a vice president at Apple, working on unnamed "special projects" and reporting to Apple CEO Tim Cook.
Eddy Cue (born Eduardo H. Cue; October 23, 1964) is Apple's senior vice president of Internet Software and Services, reporting to CEO Tim Cook.
 Cue oversees Apple's numerous content stores including the iTunes Store, the iBooks Store, and Apple Music, as well as Apple Pay, Siri (until 2017), Maps, iAd, iCloud services, and Apple’s productivity and creativity apps.
 Cue testified in the antitrust case against Apple for conspiring on eBook pricing.
iPhone 7 and iPhone 7 Plus are smartphones designed, developed, and marketed by Apple Inc. They were announced on September 7, 2016, at the Bill Graham Civic Auditorium in San Francisco by Apple CEO Tim Cook, and were released on September 16, 2016, succeeding the iPhone 6S and iPhone 6S Plus as the flagship devices in the iPhone series.
 Apple also released the iPhone 7 and 7 Plus in numerous countries worldwide throughout September and October 2016.
 They were succeeded as flagship devices by the iPhone 8 and iPhone 8 Plus on September 22, 2017 and the upcoming iPhone X on November 3, 2017.
iPhone 8 and iPhone 8 Plus are smartphones designed, developed, and marketed by Apple Inc. They were announced on September 12, 2017, alongside the higher-end iPhone X at the Steve Jobs Theater in the Apple Park campus by Apple CEO Tim Cook, succeeding the iPhone 7 and iPhone 7 Plus.
 They were released on September 22, 2017.
iPhone X (X pronounced "ten" ) is a phablet designed, developed, and marketed by Apple Inc. Apple CEO Tim Cook announced the iPhone X on September 12, 2017, alongside the iPhone 8 and iPhone 8 Plus at the Steve Jobs Theater in the Apple Park campus.
 The phone is slated for release on November 3, 2017.
 This iPhone marks the iPhone's tenth anniversary, with "X" being the symbol for "ten" in Roman numerals.
Apple Watch (stylized as WATCH) is a line of smartwatches developed, designed, and marketed by Apple Inc. It incorporates fitness tracking and health-oriented capabilities with integration with iOS and other Apple products and services.
 The original generation of the device was available in four variants: Apple Watch Sport, Apple Watch, Apple Watch Hermès, and Apple Watch Edition; each distinguished by different combinations of cases and first- or third-party interchangeable bands.
 Apple Watch relies on a wirelessly connected iPhone to perform many of its default functions such as calling and texting.
 It is compatible with the iPhone 5 or later models running iOS 8.2 or later, through the use of Wi-Fi or Bluetooth.
 Announced by Apple CEO Tim Cook in September 2014, the device was released in April 24, 2015.
 The Apple Watch quickly became the best-selling wearable device with the supply of 4.2 million smartwatches in the second quarter of the 2015 fiscal year.
 The second generation of Apple Watch, released in September 2016, includes two tiers: Apple Watch Series 2 and Apple Watch Series 1, which includes the S1P chip, but is otherwise identical to the original.
 The Series 3 was announced at a presentation at Apple Park on September 12, 2017 and was released on September 22, 2017.