The keyword phrase "11 sep famous birthdays" functions grammatically as a noun phrase. The main point and core part of speech is the noun "birthdays".
In this construction, "birthdays" is the head noun, which is the central element of the phrase. This head noun is pre-modified by two other components that specify its characteristics. The word "famous" is an adjective that describes the type of birthdays. The term "11 sep," a representation of the date 11 September, functions as an adjectival phrase (or a noun adjunct) that pinpoints the specific date of these birthdays. Together, these elements form a cohesive unit that names a specific concept: the birthdays of notable individuals occurring on September 11th.
Recognizing the keyword as a noun phrase is crucial because it dictates the article's subject matter. The content must be centered around identifying and describing a collection of things or eventsin this case, the people associated with these birthdays. The article's purpose should be informational and declarative, presenting a list, descriptions, or facts about these individuals. This grammatical understanding ensures the content directly addresses the user's search intent, which is to discover who has a birthday on that specific day, rather than to describe an action (verb) or a quality (adjective).
