You might like Left Right George the Cunt and Gilbert the Shit Gilbert & George 1969 Plank Piece I-II Charles Ray 1973 Art as an Act of Retraction Keith Arnatt 1971 I Have Decided to Go to the Tate Gallery Next Friday Keith Arnatt 1971 Art as an Act of Omission Keith Arnatt 1971 Mirror Piece Art & Language (Ian Burn) 1967 Site Sculpture Project, Windham College Pentagon, Putney, Vermont Douglas Huebler 1968 Directed Harvest Dennis Oppenheim 1966 Trouser - Word Piece Keith Arnatt 1972, printed 1989 Directed Seeding - Cancelled Crop Dennis Oppenheim 1969 ‘The Lunch Triangle’: Pilot work B. Codes and Parameters Stephen Willats 1974 Without Title (White Frame / Black Frame) Sue Arrowsmith 1969