Task: Question Answering
Input (English): However, adversarial misspellings constitute a longstanding real-world problem. Spammers continually bombard email servers, subtly misspelling words in efforts to evade spam detection while preserving the emails' intended meaning BIBREF1 , BIBREF2 . 
 Question: Why is the adversarial setting appropriate for misspelling recognition?
Output (English): Adversarial misspellings are a real-world problem