You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
You will be given a passage, and your task is to generate a Yes/No question that is answerable based on the given passage.

Powdered sugar, also called confectioners' sugar, icing sugar, and icing cake, is a finely ground sugar produced by milling granulated sugar into a powdered state. It usually contains a small amount of anti-caking agent to prevent clumping and improve flow. Although most often produced in a factory, powdered sugar can also be made by processing ordinary granulated sugar in a coffee grinder, or by crushing it by hand in a mortar and pestle.
Solution: is confectionary sugar the same as powdered sugar?
Why? The question is a yes/no question, and it is answerable based on the given passage.

New input: The Strangers is a 2008 American slasher film written and directed by Bryan Bertino. Kristen (Liv Tyler) and James (Scott Speedman) are expecting a relaxing weekend at a family vacation home, but their stay turns out to be anything but peaceful as three masked torturers leave Kristen and James struggling for survival. Writer-director Bertino was inspired by real-life events: the Manson family Tate murders, a multiple homicide; the Keddie Cabin Murders, that occurred in California in 1981; and a series of break-ins that occurred in his own neighborhood as a child. Made on a budget of $9 million, the film was shot on location in rural South Carolina in the fall of 2006.
Solution:
was the strangers movie based on true events?