Simplify the following text for a Grade 8 native English-speaking person.
Original: The standard passport format includes the name of the issuing country on a passport cover , a national symbol , a description of the document ( e.g. , passport , official passport , diplomatic passport ) , and - if the passport is biometric - the biometric passport symbol .
Simplified: A passport is a travel document that says that the person carrying it is a citizen of the country on the passport .