Mr fernandez and leaders are Concrete nouns in the sentence.
A noun is a word that typically serves as the name of a particular object or set of objects, such as living things, locations, activities, attributes, states of existence, or ideas. The word noun is derived from the Latin nmen, which means "name".
The definition of lexical categories (speech parts) is based on how their constituents mix with other expression types. In different languages, there are different noun-syntactic rules. Nouns are words that can be the head of a noun phrase in English and can appear with articles and attributive adjectives. "As far as we know, every language makes a grammatical distinction that appears like a noun verb distinction.
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