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

[EX 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?
[EX A]: Why did Tyrion give the Lannister pendant to Ros?

[EX Q]: In the 1996 film adaptation of the Island of Dr. Moreau, starring Val Kilmer and Marlon Brando. Brando's character, Dr. Moreau, plays a duet with one of his deformed creations. What is the piano piece they are playing? What is the dramatic significance of the episode?
[EX A]: In the Island of Dr. Moreau (1996) Marlon Brando's character plays what piece on the piano?

[EX Q]: This is very confusing, why would the Disease Department in The Maze Runner unleash a deadly and painful virus when there could have possibly been other ways to control the human population? like executing criminals and stuff like that? and why did the combined governments agree to it when they know that they are risking wiping every trace of human life out of existence?
[EX A]:
Why would the Disease Department unleash a disease when there could have been other ways to control the population?