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: Proton-K launch vehicle variants | Statement: [Blok-L, usedWith, Proton-K launch vehicle variants]

Target entity: Proton-K launch vehicle variants
Context triple: [Blok-L, usedWith, Proton-K launch vehicle variants]

• A. Proton rocket chosen
  The Proton rocket is a heavy-lift Russian expendable launch vehicle widely used to place large payloads, including space station modules and communications satellites, into orbit.
• B. Molniya-M rocket
  The Molniya-M rocket was a Soviet expendable launch vehicle widely used during the Cold War era to place communications, navigation, and scientific satellites into highly elliptical Molniya orbits.
• C. Vostok-K rocket
  The Vostok-K rocket was a Soviet launch vehicle that carried Yuri Gagarin on the first human spaceflight in history.
• D. Voskhod launch vehicle
  The Voskhod launch vehicle was a Soviet-era rocket derived from the R-7 family, used in the mid-1960s to send the first multi-person crews and conduct early spacewalk missions.
• E. Kosmos rocket family
  The Kosmos rocket family is a series of Soviet and Russian expendable launch vehicles used primarily to place military, scientific, and communications satellites into low Earth orbit.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.