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: Vostok (sloop-of-war) | Statement: [First Russian Antarctic Expedition, shipUsed, Vostok (sloop-of-war)]

Target entity: Vostok (sloop-of-war)
Context triple: [First Russian Antarctic Expedition, shipUsed, Vostok (sloop-of-war)]

• A. Vostok (ship) chosen
  Vostok was a Russian exploration sloop of war best known for participating in the first Russian Antarctic expedition under Fabian Gottlieb von Bellingshausen, which contributed to the discovery of the Antarctic continent.
• B. Russian battleship Oslyabya
  The Russian battleship Oslyabya was a Peresvet-class pre-dreadnought of the Imperial Russian Navy that fought in the Russo-Japanese War and was sunk at the Battle of Tsushima in 1905.
• C. Russian cruiser Varyag
  Russian cruiser Varyag was a famed early 20th-century Russian protected cruiser best known for its heroic but doomed stand against the Japanese fleet at the Battle of Chemulpo Bay during the Russo-Japanese War.
• D. Russian cruiser Admiral Nakhimov
  The Russian cruiser Admiral Nakhimov is a Soviet-era Slava-class guided missile cruiser named in honor of the famed 19th-century Russian naval commander Pavel Nakhimov.
• E. Russian battleship Sevastopol
  The Russian battleship Sevastopol was a pre-dreadnought warship of the Imperial Russian Navy that served in the Pacific Fleet and fought in the Russo-Japanese War, including the Battle of Port Arthur and the Siege of Port Arthur.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.