Which 1968 Beatles' song, which is written by Paul McCartney but credited to the song partnership Lennon-McCarney, opens the double-disc album "The Beatles" and then seques into "Dear Prudence"?
Back in the USSR (disambiguation): "Back in the U.S.S.R." is a 1968 song by the Beatles. Back in the U.S.S.R.: "Back in the U.S.S.R." is a song by the Beatles. Back in the U.S.S.R.:  It is credited to the songwriting partnership Lennon–McCartney, but written by Paul McCartney. Back in the U.S.S.R.:  The song opens the 1968 double-disc album "The Beatles" (also known as the "White Album"), and then segues into "Dear Prudence".
Back in the U.S.S.R.