The conversation between human and AI assistant.
[|Human|] Find the total number of countries in North America.
[|AI|] According to the United Nations geoscheme, there are 23 countries in the North American continent, including both its northern and southern regions. These countries are Antigua and Barbuda, The Bahamas, Barbados, Belize, Canada, Costa Rica, Cuba, Dominica, Dominican Republic, El Salvador, Grenada, Guatemala, Haiti, Honduras, Jamaica, Mexico, Nicaragua, Panama, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Trinidad and Tobago, and the United States of America.
[|Human|] 
Find the total number of countries in North America.