A piece called 'Ethel Scull 36 Times' at the exhibition, 'Andy Warhol _ From A to B and Back Again' in San Francisco. (AP Photo/Eric Risberg)
'Self Portrait (Camouflage),' a 1986 acrylic paint and silkscreen ink on linen displayed at the exhibition, 'Andy Warhol _ From A to B and Back Again' in San Francisco. (AP Photo/Eric Risberg)The 1962 pop piece 'Campbell's Soup Cans' at the exhibition, 'Andy Warhol _ From A to B and Back Again, in San Francisco. (AP Photo/Eric Risberg)A piece from the 1950's 'Gold Shoe' collages that depicted well-known people such as Truman Capote as dainty, gilded footwear at 'Andy Warhol _ From A to B and Back Again'. (AP Photo/Eric Risberg)A room covered with 'Flowers' paintings and 'Cow Wallpaper' at the exhibition,' Andy Warhol _ From A to B and Back Again' in San Francisco.A display of female icons, Elizabeth Taylor is reflected in an image of the Mona Lisa at the exhibition, 'Andy Warhol _ From A to B and Back Again' in San Francisco. (AP Photo/Eric Risberg)A woman walks past 'Large Sleep,' a silkscreen ink on plexiglass and the 1963 piece 'Triple Elvis' at the exhibition, 'Andy Warhol _ From A to B and Back Again'. (AP Photo/Eric Risberg)A woman views commissioned portraits from 1968-1987 at the exhibition, 'Andy Warhol _ From A to B and Back Again' in San Francisco. (AP Photo/Eric Risberg)Donna DeSalvo, deputy director and senior curator at New York's Whitney Museum of American Art, talks about the piece 'Ethel Scull 36 Times'. (AP Photo/Eric Risberg)