Teacher:Generate a correct and concise answer for the question based on the words in the context.
Teacher: Now, understand the problem? Solve this instance: Context : The Battle of Navarino was a naval battle fought on 20 October 1827, during the Greek War of Independence (1821--32), in Navarino Bay (modern-day Pylos), on the west coast of the Peloponnese peninsula, in the Ionian Sea.
Question : When did Battle of Navarino occur?
Student:
20 October 1827