 
 <prompt> Wetin be di first period wey dem mention for di text? 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 friendship between Russia and France. Dem two leaders bin get beta relationship after dem first meet for Tilsit for 1807. But by 1811, wahala don dey as tension dey rise and Alexander dey under pressure from Russian nobility to end di friendship. One major issue wey cause problem between di two countries na di regular breaking of di Continental System by Russians, wey make Napoleon threaten Alexander say serious gbege go happen if e form alliance with Britain. 