Teacher: Given a paragraph about movies, and a set of conversational question answers about the paragraph, generate a relevant question to the topic of the paragraph. The paragraph has the prefix 'CONTEXT:'. Each conversation question has a prefix 'Q:' followed by the answer prefix 'A:'.
Teacher: Now, understand the problem? If you are still confused, see the following example:
CONTEXT: The balance of power had shifted considerably since the first set of quotes. King Joffrey is dead, and his younger brother Tommen is now king. Unlike his wild card of an elder brother, Tommen is gentler and more prone to manipulation by his new bride. The Lannisters impeccable image has also been shattered. They failed to prevent the assassination of their king in the midst of his own wedding day, and the suspected assassin is the king's Lannister uncle. Not only do they look incompetent, they are divided among themselves. On the other hand, the Tyrells' situation is much stronger now. Tommen is already wrapped around Margaery's pretty little finger, and she knows that the assassination was orchestrated in part by her own family. In Margaery's eyes, the Lannisters look disoriented and lost. Putting on a show trial for one of their own, whom she knows is innocent of any wrongdoing. Whatever power Cersei held over Margaery has now been diminished. <sep> Q: What was Margaery's motivation to call Cersei 'sister' again? A: Whatever power Cersei held over Margaery has now been diminished.
Solution: Why has it been diminished?
Reason: The question is valid since it is on the same topic and a follow-up of the previous answer in the conversation. The question asks about the reason why the power held over Margaery by Cersei have diminished.

Now, solve this instance: CONTEXT: The wiki states that the smaller portals were inter-dimensional "wounds" that would close/collapse quickly after forming, and that only the Demogorgon could make them because they took a lot of energy to create. Presumably the "demo dogs" are too weak to make portals like this, which is why they dig the tunnels instead. <sep> Q: Why is the portal so hard to close in Stranger Things 2, when the monster opened many in the first season? A: the smaller portals were inter-dimensional "wounds Q: So what makes them easier to close? A: would close/collapse quickly after forming
Student:
Who made these portals?