When I entered the One Woman Show by Yoko Ono at MoMA I knew very little about her except what “fame” had taught me. She was married to the most famous Beatle John Lennon; they were peace activists. Both produced a lot of music; and she was a photographer. I had also heard that she split up the Beatles, but I wasn’t sure of that and later Paul said it wasn’t true. I did not know that she really was part of the conceptual art movement and perhaps even at the forefront of it. When I first encountered her book “Grapefruit” which is a conceptual art book produced in 1964…