The term "911 gedung" is a noun phrase. The core component and main point of this phrase is the word "gedung," which is an Indonesian noun meaning "building." The number "911" functions as a noun adjunct or adjectival modifier, specifying which building is being referenced.
In this construction, "gedung" serves as the head noun, establishing the subject as a physical structure. The preceding element, "911," is a proper noun (referring to the September 11, 2001 event) used to modify the head noun. This is a common linguistic pattern where a noun is used to describe another noun, providing specific context. The phrase literally translates to "the 9/11 building(s)" and is understood to refer to the World Trade Center towers destroyed in the attacks.
Identifying the term as a noun phrase with "gedung" as its head is critical because it frames the subject of an article around a tangible objectthe building itselfas defined by a historical event. This grammatical structure directs the focus toward the architecture, structure, or physical presence of the World Trade Center in the context of the 9/11 attacks, rather than on the event as an abstract concept.