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: Morgan–Keenan luminosity class system | Statement: [Harvard spectral classification, predecessorOf, Morgan–Keenan luminosity class system]

Target entity: Morgan–Keenan luminosity class system
Context triple: [Harvard spectral classification, predecessorOf, Morgan–Keenan luminosity class system]

• A. Harvard spectral classification of stars chosen
  The Harvard spectral classification of stars is an early 20th-century system that categorizes stars by their spectral characteristics and surface temperatures into types O, B, A, F, G, K, and M, forming the basis of modern stellar classification.
• B. Henry Draper Catalogue
  The Henry Draper Catalogue is a pioneering astronomical star catalog that provides spectral classifications and designations for hundreds of thousands of stars, forming a foundational resource in stellar astronomy.
• C. Hertzsprung–Russell diagram
  The Hertzsprung–Russell diagram is a fundamental astronomical chart that plots stars’ luminosities against their temperatures or spectral types, revealing key patterns of stellar evolution and classification.
• D. Bonner Durchmusterung
  Bonner Durchmusterung is a 19th-century astronomical star catalog that systematically surveyed and recorded the positions and magnitudes of hundreds of thousands of stars in the northern sky.
• E. Hubble sequence
  The Hubble sequence is a morphological classification scheme that organizes galaxies into categories such as ellipticals, spirals, and irregulars based on their visual appearance.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.