Task: Question Answering
Input (English): The final result submitted in public leaderboard is 0.73019 and in private leaderboard is 0.58455. It is quite different in bad way. That maybe is the result of the model too overfit on train set tuning on public test set. 
 Question: What is private dashboard?
Output (English): Private dashboard is leaderboard where competitors can see results after competition is finished - on hidden part of test set (private test set).