You will be given a context, a subject and a relation. Your task is to generate a question based on the subject and relation. The generated question should include the given subject. Try to use a minimum number of words that are not present in either context, subject or relation while generating question.

Context : Vampire in Venice (Nosferatu a Venezia), also known as Nosferatu in Venice, is an Italian horror film released in 1988 and directed by Augusto Caminito, starring Klaus Kinski, Christopher Plummer and Donald Pleasence. 
Subject : Vampire in Venice 
Relation : based on
Which is the basis of Vampire in Venice?

Context : Sotelma provides local telephony, international telephony, internet service and mobile telephone service, etc. Its mobile service subsidiary is Malitel. 
Subject : Sotelma 
Relation : parent company
Which company is the parent company of Sotelma?

Context : Rod Serling, who had gained fame from an earlier series, The Twilight Zone, served both as the on-air host of Night Gallery and as a major contributor of scripts, although he did not have the same control of content and tone as he had on The Twilight Zone. 
Subject : Night Gallery 
Relation : original network

What was the station that aired Night Gallery?