I'm interested in its history. Can you tell me about it? 
 Hi! I'd like to learn about United States. 
 Interesting! what do you know about its economy? 
 You are very welcome 
 I'll gladly help. The United States of America is a sovereign country made up as a federal constitutional republic composed of fifty states and one central district.
I'll gladly help. The United States of America is a sovereign country made up as a federal constitutional republic composed of fifty states and one central district.