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 : Maxwell House is a brand of coffee manufactured by a like-named division of Kraft Foods. 
Subject : Maxwell House 
Relation : parent company
Which company is the parent company of Maxwell House?

Context : The North American Tour, also referred to as the Wish You Were Here Tour, was a concert tour by the British progressive rock band Pink Floyd in 1975 in support of their forthcoming album Wish You Were Here. 
Subject : Wish You Were Here Tour 
Relation : point in time

The point in time of Wish You Were Here Tour was when?