The term "911 band" functions as a proper noun. It refers to a specific, unique entity: the British pop group formed in 1995. As a proper noun, it names a particular musical group, distinguishing it from all other bands.
Grammatically, the term is a compound construction. "Band" is the core common noun, which is modified by "911." In this context, "911" acts as a noun adjunct (or attributive noun), a type of modifier that specifies which band is being referenced. Although "911" is a number, it functions adjectivally within the phrase to form a single, specific name.
Identifying the term as a proper noun is crucial for its use in an article. It dictates that the term will serve as a subject, object, or complement in a sentence (e.g., "911 band achieved success in the UK."). This classification ensures correct syntax and capitalization, treating the name as a singular conceptual unit throughout the text.
