Lennon, John; Ono, Yoko

«John Lennon, member of the famous Beatles, also pursued diverse interests from revolutionary politics to television talk-shows. He and his second wife, Yoko Ono, made and produced collaborative albums under the ‹John Lennon/Plastic Ono Band and Imagine› label often working on charitable projects. He took a break from the music business for the last five years of his life, re-entering it with the duet album Double Fantasy (with Ono) the fall before he was shot and killed on his way back from a recording session in December 1980.
Yoko Ono received her first degree in philosophy from Tokyo‘s Gakushin University, and went on to study philosophy and music at Sarah Lawrence College in New York. She married John Lennon in 1969, working with him in various musical, artistic, and political projects. As an artist, poet, performer, and composer she was also involved in the beginnings of the Fluxus movement in the 1960s. Her art used to include the viewer as an active participant and ceased to distinguish itself deliberately from everyday life.»

(source: Thomas Y. Levin, Ursula Frohne, Peter Weibel (eds), CTRL [Space]. Rhetoric of Surveillance from Bentham to Big Brother, ZKM, Center for Art and Media, Karlsruhe, 2002, p. 643.)