Question: What kind of compilation does Subways and Wildflower have in common?
Related documents: [0]  [DOC] Wildflower is the second studio album recorded by Australian electronic music group the Avalanches. It was first released for streaming on Apple Music on 1 July 2016, and saw a full release a week later on 8 July. It was issued through Modular Recordings, Astralwerks, XL Recordings, and EMI. Production of the album was led by Robbie Chater with assistance from Tony Di Blasi and lasted nearly 16 years, commencing shortly after the release of their debut album, "Since I Left You", in November 2000 and not concluding until March 2016. The album features multiple guest collaborators providing vocals and live instrumentation across its 21 tracks. "Wildflower" also features extensive sampling, especially from 1960s psychedelic music, and relates to the era through themes of counterculture and anti-establishment. Chater described the album's structure as a road trip from a hyperrealistic urban environment to somewhere remote and far away while on LSD. [END] 
[1]  [DOC] "Subways" is a song by Australian electronic music group The Avalanches. The song was released as the third single from their second studio album, "Wildflower" (2016), on 22 June 2016. The song rose to number 81 on the Australian ARIA Charts. [END] 
Answer: 
album
album