 
 <prompt> Wetin be di first event wey dem mention? Based on di previous question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: In 1808, Napoleon and Czar Alexander meet for Congress of Erfurt to save the Russo-French alliance. Dem leaders bin get friendly relationship after dem first meet for Tilsit for 1807. But by 1811, tension don dey high and Alexander dey under pressure from Russian nobility to end the alliance. One major issue wey dey cause problem between the two countries na the regular breaking of the Continental System by Russians, wey make Napoleon threaten Alexander say serious consequences go happen if he form alliance with Britain. 