Question: The song Pepperland Laid Waste was part of a soundtrack album to a film that premiered in what month and year?
Related documents: [0]  [DOC] "Pepperland Laid Waste" is an instrumental orchestral piece conducted and composed by The Beatles' producer George Martin for the "Yellow Submarine" film and was the sixth track on the orchestral Side 2 of the film's soundtrack album by The Beatles, released in 1969. [END] 
[1]  [DOC] Yellow Submarine is the tenth studio album by English rock band the Beatles, released on 13 January 1969 in the United States and on 17 January 1969 in the United Kingdom. It was issued as the soundtrack to the animated film of the same name, which premiered in London in July 1968. The album contains six songs by the Beatles, including four new songs and the previously released "Yellow Submarine" (1966) and "All You Need Is Love" (1967). The remainder of the album was a re-recording of the film's orchestral soundtrack by the band's producer, George Martin. [END] 
Answer: 
July 1968
July 1968