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.
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?
Example solution: Nmbia is a country in southern Africa.
Example explanation: This is a good example. The output is the response to the question asked by the user.

Problem: Similar threats appeared in the east, where Russian principalities were expanding westward 
 Can you tell me about the geography? 
 Hi, could you tell me about Estonia? 
 Many species extinct in most of the European countries can be still found in Estonia 
 Is there anything else?

Solution: Similar threats appeared in the east, where Russian principalities were expanding westward