Given the task definition and input, reply with output. In this task, you are given dialogue, and you have to find the most critical location in the given conversation.

Greetings. I need some information about Iran. Can you tell me about the location/?
Yes I can. Iran is also called Persia, and is located in Western Asia
Great! Can you tell me something about the name?
Yes! People use Iran and Persia interchangeably. With Iran usually used in historical context vs. Persia is used in a more modern context and usually refers to West Iran.
That is very interesting. Can you tell me more about the name?
Yes, the name can be often seen from Shadows in the Desert: Ancient Persia at War
I did not know that at all! That is really a cool fact. Any other fun facts>
The eastern part of Iran actually has mostly desert basins, including the Kavir Desert.
Oh wow! Can we switch to Government and politics now.
Sure! Did you know that earlier this year in April the U.S. threatened to sanction countries who continued to buy oil from Iran after a 6-month waiver from November expired?
I did not know that they threatened a sanction. Do you have more info like this?
Yes I do. In July 2015, the Joint Comprehensive Plan of Action was established with the goal of loosening nuclear sanctions in exchange for Iran's restriction in producing enriched uranium
you have been such a help! Thank you so very much!
It's been my pleasure!
Iran