The phrase functions as a noun phrase. Its core is the compound noun "mini game," which is being modified by the preceding term "11 sep." This structure serves to name a specific, singular concept or category of an object.
Grammatically, "11 sep" acts as an attributive noun or a noun adjunct. Although it represents a date, in this context, it functions like an adjective to specify the theme or subject matter of the "mini game." The entire three-word unit operates cohesively as a single noun, which can act as the subject, object, or complement within a sentence, fulfilling the primary functional role of a noun.
Determining this grammatical function is critical because it establishes the article's focus. By identifying the term as a noun phrase, the article is framed to be about a specific thing or concept. The purpose, therefore, becomes to define, describe, analyze, or provide examples of this entity, rather than to describe an action (verb) or a quality (adjective). This dictates a content strategy centered on explanation and analysis of the subject itself.
