Task: Explanation
Input (English): From the Sky Down is a 2011 American documentary film directed by Davis Guggenheim about rock band U2 and the production of their 1991 album "Achtung Baby". The film documents the album's difficult recording period, the band members' relationships, and the group's creative process. Guggenheim, who was commissioned by U2 to create the film to commemorate the record's 20th anniversary, spent several months in 2011 developing the documentary. The band were filmed during a return visit to Hansa Studios in Berlin where parts of the album were recorded, and during rehearsals in Winnipeg for the Glastonbury Festival 2011. The film contains unreleased scenes from the group's 1988 motion picture "Rattle and Hum", along with archival footage and stills from the "Achtung Baby" recording sessions. Development of the album's emblematic song "One" is recounted through the replaying of old recording tapes. Question: Who wrote the lyrics to the emblematic song recounted through the replaying of old recording tapes in the film From the Sky Down?  Answer: Bono
Output (English):  Development of the albums emblematic song One is recounted through the replaying of old recording tapes.