In this task, the input is a set of dialogues between a user and an assistant. You need to find the dialogue that is basically a response given to a question or an aspect of the user.

Let me give you an example: Hi. I want information about Namibia.
Nmbia is a country in southern Africa.
Do you have information about the media there?
What about it?
Interesting! What can you tell me about the politics and government?
The answer to this example can be: Nmbia is a country in southern Africa.
Here is why: This is a good example. The output is the response to the question asked by the user.

OK. solve this:
That's something I didn't know before. Tell me about their economy please.
That's interesting. Tell me more.
Okay, tell me about their demographics, if you don't mind.
Thanks for the tip, I've really learnt a lot under you today.
According to the United Nationa, in 2016 Costa Rica had an estimated population of 4,857,274 people. White and Mestizos make up 83.4% population, 7% are black people and 2.4% Amerindians, and 0.2% Asians and 7% are other or none.
Answer:
According to the United Nationa, in 2016 Costa Rica had an estimated population of 4,857,274 people. White and Mestizos make up 83.4% population, 7% are black people and 2.4% Amerindians, and 0.2% Asians and 7% are other or none.