Triple

Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).

Phrase: Locks and Dam No. 15 | Statement: [Rock Island (island in the Mississippi River), hasLandmark, Locks and Dam No. 15]

Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"

Entity: Locks and Dam No. 15
Triple: [Rock Island (island in the Mississippi River), hasLandmark, Locks and Dam No. 15]

Locks and Dam No. 15 is a major Mississippi River navigation structure near Rock Island, Illinois, notable for having one of the longest roller dams in the world and forming part of the Upper Mississippi River system of locks and dams.