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: southern extension of Line 4 (Beijing Subway) | Statement: [Daxing Line (Beijing Subway), partOf, southern extension of Line 4 (Beijing Subway)]

Target entity: southern extension of Line 4 (Beijing Subway)
Context triple: [Daxing Line (Beijing Subway), partOf, southern extension of Line 4 (Beijing Subway)]

• A. Line 4 (Beijing Subway) chosen
  Line 4 of the Beijing Subway is a major north–south rapid transit line serving central Beijing, connecting key commercial, residential, and cultural areas and linking with multiple other subway lines.
• B. Batong Line (Beijing Subway)
  The Batong Line of the Beijing Subway is an eastern suburban rapid transit line that extends the main network into the Tongzhou District, serving as a key commuter corridor for residents traveling to and from central Beijing.
• C. Yanfang Line (Beijing Subway)
  The Yanfang Line of the Beijing Subway is a suburban rapid transit line serving the southwestern outskirts of Beijing, designed to improve connectivity for outlying districts to the main urban rail network.
• D. Beijing Subway Line 16
  Beijing Subway Line 16 is a rapid transit line in Beijing’s subway network that runs generally north–south, connecting the city’s northern suburbs with central and southwestern districts.
• E. Line 14 (Beijing Subway)
  Line 14 of the Beijing Subway is a major urban rail line serving key residential and commercial districts in Beijing as part of the city's extensive metro network.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.