Task: Question Answering
Input (English): Context: The Battle of St. Lucia or the Battle of the Cul de Sac was a naval battle fought off the island of St. Lucia in the West Indies during the Anglo-French War on 15 December 1778, between the British Royal Navy and the French Navy. 
 Question: On what date did Battle of St. Lucia end?
Output (English): 15 december 1778