Context: Slavic studies began as an almost exclusively linguistic and philological enterprise. As early as 1833, Slavic languages were recognized as Indo-European.

Question: What began as an almost exclusively linguistic and philological enterprise?
Answer: Slavic studies

Question: When were Slavic languages recognized as Indo-European?
Answer: As early as 1833

Question: What languages were recognized as Indo-European?
Answer: Slavic languages

Question: In 1833, Slavic languages were recognized as what?
Answer: Indo-European

Question: When did Slavic studies become a linguistic enterprise?
Answer: Unanswerable

Question: What were Indo-European studies recognized as?
Answer: Unanswerable

Question: What did Indo-European studies begin as?
Answer: Unanswerable

Question: What was recognized as Slavic languages?
Answer: Unanswerable

Question: When did linguistic studies begin?
Answer: Unanswerable