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.

A natural mummy known as Otzi the Iceman was discovered in 1991. It was determined to be about 5000 years old and from sometimes between 3400 and 3100 BCE, also known as the Copper Age.
assistant