The keyword term is a compound noun phrase. Its core grammatical subject and main point is the head noun, "posts". This word identifies the central subject of analysis: specific units of user-generated content. All other words in the phrase serve to modify and specify this primary noun.
A grammatical analysis shows a clear hierarchy of modification. The plural noun "posts" is the object of study. It is first modified by the compound noun "social media," which functions as an adjective to specify the medium or platform. This unit is then further modified by "September 11th," a proper noun specifying the temporal and thematic context. This structure isolates the digital artifacts ("posts") as the primary subject, with the preceding terms providing the necessary classification for the research scope.
This determination dictates that the main point of any resulting article must be the analysis of the posts themselves. The focus is not on the event of September 11th or the nature of social media in general, but rather on the specific content, sentiment, and user interactions embodied in the digital communications created within that defined context. The analytical approach would therefore center on methods like content analysis, discourse analysis, or sentiment analysis of the posts.
