Street art can include traditional graffiti artwork, sculpture, stencil graffiti, sticker art, wheatpasting and street poster art, video projection, art intervention, guerrilla art, and street installations. Artists have challenged art by situating it in non-art contexts. ‘Street’ artists do not aspire to change the definition of an artwork, but rather to question the existing environment with its own language. They attempt to have their work communicate with everyday people about socially relevant themes in ways that are informed by esthetic values without being imprisoned by them.