Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title

Ex Input:
As we all know, the most exciting part of seeing a movie is the trailers of upcoming movies before the actual film (note, this is coming from an American point of view, I am uncertain if this occurs in theatres everywhere).  However, there doesn't seem to be much of a forethought given to what trailers are shown, besides making sure big movie trailers are shown before other big movies. For instance, the idea of seeing a Dark Knight Rises trailer before Avengers (two different production companies, let alone two rival comic book companies) doesn't seem to make much sense to me.  Is there a strict guideline trailers are released controlled by the MPAA or do the theatres have free run of what to show?

Ex Output:
What factors go into determining what trailers are played before movies?


Ex Input:
In The Craft, prior to invoking Manon, where does the power that the other three girls seem to have come from?  It's nowhere near as strong as Sarah's power, who is a natural witch. She's the one who actually seems to be responsible for pretty much every spell before Manon steps in. Nancy is obviously a little stronger herself, killing her step-father. Bonnie and Rochelle do virtually nothing, but I suppose being able to even assist in invoking Manon means they must have SOME ability.  Where does it come from? Did they just study to learn their powers?

Ex Output:
Where do the powers come from?


Ex Input:
Hitler was definitely shot to death by the Basterds but he would have died in the fire anyways. Shoshanna had everything planned well to trap everyone in theatre including her, there was no escape. So when looking at this movie if the parts with the Basterds were removed her plan would have still worked. So were they even needed?

Ex Output:

Did the Basterds actually change anything?