During the 1940s, 1950s, and 1960s, general semantics entered the idiom of science fiction. Notable examples include the works of A. E. van Vogt, "The World of Null-A" and its sequels. General semantics appear also in Robert A. Heinlein's work, especially "Gulf". Bernard Wolfe drew on general semantics in his 1952 science fiction novel "Limbo". Frank Herbert's novels "Dune" and "Whipping Star" are also indebted to general semantics. The ideas of general semantics became a sufficiently important part of the shared intellectual toolkit of genre science fiction to merit parody by Damon Knight and others; they have since shown a tendency to reappear in the work of more recent writers such as Samuel R. Delany, Suzette Haden Elgin and Robert Anton Wilson. In 2008, John Wright extended van Vogt's Null-A series with "Null-A Continuum". William Burroughs references Korzybski's time binding principle in his essay The Electronic Revolution, and elsewhere. Henry Beam Piper explicitly mentioned general semantics in "Murder in the Gunroom", and its principles, such as awareness of the limitations of knowledge, are apparent in his later work. A fictional rendition of the "Institute of General Semantics" appears in the 1965 French science fiction film, Alphaville, directed by Jean-Luc Godard.