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

Q: So was Jon Snow brought back to life in Game of Thrones to kill Daenerys? To me it makes sense, I'm not sure if I missed something along the way. It also backs the point that Daenerys would do no good for the world as the queen of Westeros.

A: Is this the purpose of bringing back Jon?
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Q: In season 2, Cersei Lannister captures Ros. Cersei mistakenly thinks that her brother Tyrion is secretly in love with Ros, because Ros wears a Lannister pendant. This mistake probably saved his real love, Shae, from Cersei.  I read that Tyrion gave this pendant to Ros when they were still in Winterfell. Is this true? Was this shown in the TV show? I can't remember it.  If it's true, why did Tyrion make this present? Could it be him foreseeing such a situation?

A: Why did Tyrion give the Lannister pendant to Ros?
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Q: In Star Wars movies, Jedi often kill their opponent (for example, Obi-Wan kills Darth Maul in the first movie and again Obi-Wan, at the end of the third movie, leaves Anakin dismembered and on fire, thinking he is going to die), but when the Chancellor orders Anakin to kill Dooku, he says:    I shouldn't. This is not the Jedi way.   So I wonder, can Jedi kill?   Or is it a mere plot device to make the fall and the internal struggle of Anakin more romantic.

A:
In Star Wars, can a Jedi kill?
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