Given the task definition and input, reply with output. In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

A passport is a travel document that says that the person who owns it is a citizen of the country on the passport .

A passport is a travel document , usually issued by a country 's government to its citizens , that certifies the identity and nationality of its holder primarily for the purpose of international travel .