Madden Publishing is a proper noun.
- A proper noun could be a noun that identifies and refers to a specific entity, as critical a standard noun, that refers to category of entities and will be wont to visit samples of that class (a continent, another planet, these persons, our corporation).
- Some proper nouns appear in plural form, referring to groupings of entities that are regarded distinct. Proper nouns can also be found in secondary applications, such as modifying nouns or acting as common nouns.
- The term's precise definition is problematic and, to some part, regulated by tradition. In modern linguistics, a distinction is usually drawn between proper nouns and proper names.
- Because the term noun refers to a group of single words, only single-word proper names are proper nouns: Peter and Africa are both proper names and proper nouns; but, Peter the Great and South Africa, while proper names, are not proper nouns.
Thus, this is the meaning of proper noun.
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The complete question is here:
MADDEN PUBLISHING has its headquarters located downtown.