In this task, you are given a dialogue between a user and an assistant, where users and assistants converse about geographic topics like geopolitical entities and locations. The task here is to find if the dialogue is by the user or assistant. Classify your answers into user and assistant.

What caused this’d higher birth rate ?
user
The given sentence is asking a question. Therefore, the person who is speaking could be a user instead of an assistant. So, 'user' is the correct answer in this case..