Based on the search results, "What Have You Done to Solange?" is a movie directed by Massimo Dallamano in 1972. It is a thriller movie that follows a series of violent murders occurring at a Catholic girls school in London, where a young student has gone missing. The plot revolves around a teacher who is having an affair with one of his students and is reluctant to present an alibi when his lover witnesses the first in a series of murders. The movie is considered a giallo, which is an Italian genre of literature and film that combines elements of crime fiction and horror fiction. The movie has been released on DVD and Blu-ray.